{"version":3,"file":"vendors~main.4219b8cb7d58862b56fa.bundle.js","sources":["webpack:///./node_modules/prop-types/index.js","webpack:///./node_modules/object-assign/index.js","webpack:///./node_modules/isobject/index.js","webpack:///./node_modules/es5-shim/es5-shim.js","webpack:///./node_modules/es5-shim/es5-sham.js","webpack:///./node_modules/es6-shim/es6-shim.js","webpack:///./node_modules/is-plain-object/index.js","webpack:///./node_modules/react/cjs/react.production.min.js","webpack:///./node_modules/react-dom/cjs/react-dom.production.min.js","webpack:///./node_modules/react-dom/node_modules/scheduler/cjs/scheduler.production.min.js","webpack:///./node_modules/@storybook/theming/node_modules/react/cjs/react.production.min.js","webpack:///./node_modules/react-is/cjs/react-is.production.min.js","webpack:///./node_modules/react-dom/cjs/react-dom-unstable-native-dependencies.production.min.js"],"sourcesContent":["/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nif (process.env.NODE_ENV !== 'production') {\n  var ReactIs = require('react-is');\n\n  // By explicitly using `prop-types` you are opting into new development behavior.\n  // http://fb.me/prop-types-in-prod\n  var throwOnDirectAccess = true;\n  module.exports = require('./factoryWithTypeCheckers')(ReactIs.isElement, throwOnDirectAccess);\n} else {\n  // By explicitly using `prop-types` you are opting into new production behavior.\n  // http://fb.me/prop-types-in-prod\n  module.exports = require('./factoryWithThrowingShims')();\n}\n","/*\nobject-assign\n(c) Sindre Sorhus\n@license MIT\n*/\n\n'use strict';\n/* eslint-disable no-unused-vars */\nvar getOwnPropertySymbols = Object.getOwnPropertySymbols;\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\nvar propIsEnumerable = Object.prototype.propertyIsEnumerable;\n\nfunction toObject(val) {\n\tif (val === null || val === undefined) {\n\t\tthrow new TypeError('Object.assign cannot be called with null or undefined');\n\t}\n\n\treturn Object(val);\n}\n\nfunction shouldUseNative() {\n\ttry {\n\t\tif (!Object.assign) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Detect buggy property enumeration order in older V8 versions.\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=4118\n\t\tvar test1 = new String('abc');  // eslint-disable-line no-new-wrappers\n\t\ttest1[5] = 'de';\n\t\tif (Object.getOwnPropertyNames(test1)[0] === '5') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test2 = {};\n\t\tfor (var i = 0; i < 10; i++) {\n\t\t\ttest2['_' + String.fromCharCode(i)] = i;\n\t\t}\n\t\tvar order2 = Object.getOwnPropertyNames(test2).map(function (n) {\n\t\t\treturn test2[n];\n\t\t});\n\t\tif (order2.join('') !== '0123456789') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test3 = {};\n\t\t'abcdefghijklmnopqrst'.split('').forEach(function (letter) {\n\t\t\ttest3[letter] = letter;\n\t\t});\n\t\tif (Object.keys(Object.assign({}, test3)).join('') !==\n\t\t\t\t'abcdefghijklmnopqrst') {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t} catch (err) {\n\t\t// We don't expect any of the above to throw, but better to be safe.\n\t\treturn false;\n\t}\n}\n\nmodule.exports = shouldUseNative() ? Object.assign : function (target, source) {\n\tvar from;\n\tvar to = toObject(target);\n\tvar symbols;\n\n\tfor (var s = 1; s < arguments.length; s++) {\n\t\tfrom = Object(arguments[s]);\n\n\t\tfor (var key in from) {\n\t\t\tif (hasOwnProperty.call(from, key)) {\n\t\t\t\tto[key] = from[key];\n\t\t\t}\n\t\t}\n\n\t\tif (getOwnPropertySymbols) {\n\t\t\tsymbols = getOwnPropertySymbols(from);\n\t\t\tfor (var i = 0; i < symbols.length; i++) {\n\t\t\t\tif (propIsEnumerable.call(from, symbols[i])) {\n\t\t\t\t\tto[symbols[i]] = from[symbols[i]];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn to;\n};\n","/*!\n * isobject <https://github.com/jonschlinkert/isobject>\n *\n * Copyright (c) 2014-2017, Jon Schlinkert.\n * Released under the MIT License.\n */\n\n'use strict';\n\nmodule.exports = function isObject(val) {\n  return val != null && typeof val === 'object' && Array.isArray(val) === false;\n};\n","/*!\n * https://github.com/es-shims/es5-shim\n * @license es5-shim Copyright 2009-2015 by contributors, MIT License\n * see https://github.com/es-shims/es5-shim/blob/master/LICENSE\n */\n\n// vim: ts=4 sts=4 sw=4 expandtab\n\n// Add semicolon to prevent IIFE from being passed as argument to concatenated code.\n;\n\n// UMD (Universal Module Definition)\n// see https://github.com/umdjs/umd/blob/master/templates/returnExports.js\n(function (root, factory) {\n    'use strict';\n\n    /* global define, exports, module */\n    if (typeof define === 'function' && define.amd) {\n        // AMD. Register as an anonymous module.\n        define(factory);\n    } else if (typeof exports === 'object') {\n        // Node. Does not work with strict CommonJS, but\n        // only CommonJS-like enviroments that support module.exports,\n        // like Node.\n        module.exports = factory();\n    } else {\n        // Browser globals (root is window)\n        root.returnExports = factory();\n    }\n}(this, function () {\n    /**\n     * Brings an environment as close to ECMAScript 5 compliance\n     * as is possible with the facilities of erstwhile engines.\n     *\n     * Annotated ES5: http://es5.github.com/ (specific links below)\n     * ES5 Spec: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf\n     * Required reading: http://javascriptweblog.wordpress.com/2011/12/05/extending-javascript-natives/\n     */\n\n    // Shortcut to an often accessed properties, in order to avoid multiple\n    // dereference that costs universally. This also holds a reference to known-good\n    // functions.\n    var $Array = Array;\n    var ArrayPrototype = $Array.prototype;\n    var $Object = Object;\n    var ObjectPrototype = $Object.prototype;\n    var $Function = Function;\n    var FunctionPrototype = $Function.prototype;\n    var $String = String;\n    var StringPrototype = $String.prototype;\n    var $Number = Number;\n    var NumberPrototype = $Number.prototype;\n    var array_slice = ArrayPrototype.slice;\n    var array_splice = ArrayPrototype.splice;\n    var array_push = ArrayPrototype.push;\n    var array_unshift = ArrayPrototype.unshift;\n    var array_concat = ArrayPrototype.concat;\n    var array_join = ArrayPrototype.join;\n    var call = FunctionPrototype.call;\n    var apply = FunctionPrototype.apply;\n    var max = Math.max;\n    var min = Math.min;\n\n    // Having a toString local variable name breaks in Opera so use to_string.\n    var to_string = ObjectPrototype.toString;\n\n    /* global Symbol */\n    /* eslint-disable one-var-declaration-per-line, no-redeclare, max-statements-per-line */\n    var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';\n    var isCallable; /* inlined from https://npmjs.com/is-callable */ var fnToStr = Function.prototype.toString, constructorRegex = /^\\s*class /, isES6ClassFn = function isES6ClassFn(value) { try { var fnStr = fnToStr.call(value); var singleStripped = fnStr.replace(/\\/\\/.*\\n/g, ''); var multiStripped = singleStripped.replace(/\\/\\*[.\\s\\S]*\\*\\//g, ''); var spaceStripped = multiStripped.replace(/\\n/mg, ' ').replace(/ {2}/g, ' '); return constructorRegex.test(spaceStripped); } catch (e) { return false; /* not a function */ } }, tryFunctionObject = function tryFunctionObject(value) { try { if (isES6ClassFn(value)) { return false; } fnToStr.call(value); return true; } catch (e) { return false; } }, fnClass = '[object Function]', genClass = '[object GeneratorFunction]', isCallable = function isCallable(value) { if (!value) { return false; } if (typeof value !== 'function' && typeof value !== 'object') { return false; } if (hasToStringTag) { return tryFunctionObject(value); } if (isES6ClassFn(value)) { return false; } var strClass = to_string.call(value); return strClass === fnClass || strClass === genClass; };\n\n    var isRegex; /* inlined from https://npmjs.com/is-regex */ var regexExec = RegExp.prototype.exec, tryRegexExec = function tryRegexExec(value) { try { regexExec.call(value); return true; } catch (e) { return false; } }, regexClass = '[object RegExp]'; isRegex = function isRegex(value) { if (typeof value !== 'object') { return false; } return hasToStringTag ? tryRegexExec(value) : to_string.call(value) === regexClass; };\n    var isString; /* inlined from https://npmjs.com/is-string */ var strValue = String.prototype.valueOf, tryStringObject = function tryStringObject(value) { try { strValue.call(value); return true; } catch (e) { return false; } }, stringClass = '[object String]'; isString = function isString(value) { if (typeof value === 'string') { return true; } if (typeof value !== 'object') { return false; } return hasToStringTag ? tryStringObject(value) : to_string.call(value) === stringClass; };\n    /* eslint-enable one-var-declaration-per-line, no-redeclare, max-statements-per-line */\n\n    /* inlined from http://npmjs.com/define-properties */\n    var supportsDescriptors = $Object.defineProperty && (function () {\n        try {\n            var obj = {};\n            $Object.defineProperty(obj, 'x', { enumerable: false, value: obj });\n            for (var _ in obj) { // jscs:ignore disallowUnusedVariables\n                return false;\n            }\n            return obj.x === obj;\n        } catch (e) { /* this is ES3 */\n            return false;\n        }\n    }());\n    var defineProperties = (function (has) {\n        // Define configurable, writable, and non-enumerable props\n        // if they don't exist.\n        var defineProperty;\n        if (supportsDescriptors) {\n            defineProperty = function (object, name, method, forceAssign) {\n                if (!forceAssign && (name in object)) {\n                    return;\n                }\n                $Object.defineProperty(object, name, {\n                    configurable: true,\n                    enumerable: false,\n                    writable: true,\n                    value: method\n                });\n            };\n        } else {\n            defineProperty = function (object, name, method, forceAssign) {\n                if (!forceAssign && (name in object)) {\n                    return;\n                }\n                object[name] = method;\n            };\n        }\n        return function defineProperties(object, map, forceAssign) {\n            for (var name in map) {\n                if (has.call(map, name)) {\n                    defineProperty(object, name, map[name], forceAssign);\n                }\n            }\n        };\n    }(ObjectPrototype.hasOwnProperty));\n\n    //\n    // Util\n    // ======\n    //\n\n    /* replaceable with https://npmjs.com/package/es-abstract /helpers/isPrimitive */\n    var isPrimitive = function isPrimitive(input) {\n        var type = typeof input;\n        return input === null || (type !== 'object' && type !== 'function');\n    };\n\n    var isActualNaN = $Number.isNaN || function isActualNaN(x) {\n        return x !== x;\n    };\n\n    var ES = {\n        // ES5 9.4\n        // http://es5.github.com/#x9.4\n        // http://jsperf.com/to-integer\n        /* replaceable with https://npmjs.com/package/es-abstract ES5.ToInteger */\n        ToInteger: function ToInteger(num) {\n            var n = +num;\n            if (isActualNaN(n)) {\n                n = 0;\n            } else if (n !== 0 && n !== (1 / 0) && n !== -(1 / 0)) {\n                n = (n > 0 || -1) * Math.floor(Math.abs(n));\n            }\n            return n;\n        },\n\n        /* replaceable with https://npmjs.com/package/es-abstract ES5.ToPrimitive */\n        ToPrimitive: function ToPrimitive(input) {\n            var val, valueOf, toStr;\n            if (isPrimitive(input)) {\n                return input;\n            }\n            valueOf = input.valueOf;\n            if (isCallable(valueOf)) {\n                val = valueOf.call(input);\n                if (isPrimitive(val)) {\n                    return val;\n                }\n            }\n            toStr = input.toString;\n            if (isCallable(toStr)) {\n                val = toStr.call(input);\n                if (isPrimitive(val)) {\n                    return val;\n                }\n            }\n            throw new TypeError();\n        },\n\n        // ES5 9.9\n        // http://es5.github.com/#x9.9\n        /* replaceable with https://npmjs.com/package/es-abstract ES5.ToObject */\n        ToObject: function (o) {\n            if (o == null) { // this matches both null and undefined\n                throw new TypeError(\"can't convert \" + o + ' to object');\n            }\n            return $Object(o);\n        },\n\n        /* replaceable with https://npmjs.com/package/es-abstract ES5.ToUint32 */\n        ToUint32: function ToUint32(x) {\n            return x >>> 0;\n        }\n    };\n\n    //\n    // Function\n    // ========\n    //\n\n    // ES-5 15.3.4.5\n    // http://es5.github.com/#x15.3.4.5\n\n    var Empty = function Empty() {};\n\n    defineProperties(FunctionPrototype, {\n        bind: function bind(that) { // .length is 1\n            // 1. Let Target be the this value.\n            var target = this;\n            // 2. If IsCallable(Target) is false, throw a TypeError exception.\n            if (!isCallable(target)) {\n                throw new TypeError('Function.prototype.bind called on incompatible ' + target);\n            }\n            // 3. Let A be a new (possibly empty) internal list of all of the\n            //   argument values provided after thisArg (arg1, arg2 etc), in order.\n            // XXX slicedArgs will stand in for \"A\" if used\n            var args = array_slice.call(arguments, 1); // for normal call\n            // 4. Let F be a new native ECMAScript object.\n            // 11. Set the [[Prototype]] internal property of F to the standard\n            //   built-in Function prototype object as specified in 15.3.3.1.\n            // 12. Set the [[Call]] internal property of F as described in\n            //   15.3.4.5.1.\n            // 13. Set the [[Construct]] internal property of F as described in\n            //   15.3.4.5.2.\n            // 14. Set the [[HasInstance]] internal property of F as described in\n            //   15.3.4.5.3.\n            var bound;\n            var binder = function () {\n\n                if (this instanceof bound) {\n                    // 15.3.4.5.2 [[Construct]]\n                    // When the [[Construct]] internal method of a function object,\n                    // F that was created using the bind function is called with a\n                    // list of arguments ExtraArgs, the following steps are taken:\n                    // 1. Let target be the value of F's [[TargetFunction]]\n                    //   internal property.\n                    // 2. If target has no [[Construct]] internal method, a\n                    //   TypeError exception is thrown.\n                    // 3. Let boundArgs be the value of F's [[BoundArgs]] internal\n                    //   property.\n                    // 4. Let args be a new list containing the same values as the\n                    //   list boundArgs in the same order followed by the same\n                    //   values as the list ExtraArgs in the same order.\n                    // 5. Return the result of calling the [[Construct]] internal\n                    //   method of target providing args as the arguments.\n\n                    var result = apply.call(\n                        target,\n                        this,\n                        array_concat.call(args, array_slice.call(arguments))\n                    );\n                    if ($Object(result) === result) {\n                        return result;\n                    }\n                    return this;\n\n                } else {\n                    // 15.3.4.5.1 [[Call]]\n                    // When the [[Call]] internal method of a function object, F,\n                    // which was created using the bind function is called with a\n                    // this value and a list of arguments ExtraArgs, the following\n                    // steps are taken:\n                    // 1. Let boundArgs be the value of F's [[BoundArgs]] internal\n                    //   property.\n                    // 2. Let boundThis be the value of F's [[BoundThis]] internal\n                    //   property.\n                    // 3. Let target be the value of F's [[TargetFunction]] internal\n                    //   property.\n                    // 4. Let args be a new list containing the same values as the\n                    //   list boundArgs in the same order followed by the same\n                    //   values as the list ExtraArgs in the same order.\n                    // 5. Return the result of calling the [[Call]] internal method\n                    //   of target providing boundThis as the this value and\n                    //   providing args as the arguments.\n\n                    // equiv: target.call(this, ...boundArgs, ...args)\n                    return apply.call(\n                        target,\n                        that,\n                        array_concat.call(args, array_slice.call(arguments))\n                    );\n\n                }\n\n            };\n\n            // 15. If the [[Class]] internal property of Target is \"Function\", then\n            //     a. Let L be the length property of Target minus the length of A.\n            //     b. Set the length own property of F to either 0 or L, whichever is\n            //       larger.\n            // 16. Else set the length own property of F to 0.\n\n            var boundLength = max(0, target.length - args.length);\n\n            // 17. Set the attributes of the length own property of F to the values\n            //   specified in 15.3.5.1.\n            var boundArgs = [];\n            for (var i = 0; i < boundLength; i++) {\n                array_push.call(boundArgs, '$' + i);\n            }\n\n            // XXX Build a dynamic function with desired amount of arguments is the only\n            // way to set the length property of a function.\n            // In environments where Content Security Policies enabled (Chrome extensions,\n            // for ex.) all use of eval or Function costructor throws an exception.\n            // However in all of these environments Function.prototype.bind exists\n            // and so this code will never be executed.\n            bound = $Function('binder', 'return function (' + array_join.call(boundArgs, ',') + '){ return binder.apply(this, arguments); }')(binder);\n\n            if (target.prototype) {\n                Empty.prototype = target.prototype;\n                bound.prototype = new Empty();\n                // Clean up dangling references.\n                Empty.prototype = null;\n            }\n\n            // TODO\n            // 18. Set the [[Extensible]] internal property of F to true.\n\n            // TODO\n            // 19. Let thrower be the [[ThrowTypeError]] function Object (13.2.3).\n            // 20. Call the [[DefineOwnProperty]] internal method of F with\n            //   arguments \"caller\", PropertyDescriptor {[[Get]]: thrower, [[Set]]:\n            //   thrower, [[Enumerable]]: false, [[Configurable]]: false}, and\n            //   false.\n            // 21. Call the [[DefineOwnProperty]] internal method of F with\n            //   arguments \"arguments\", PropertyDescriptor {[[Get]]: thrower,\n            //   [[Set]]: thrower, [[Enumerable]]: false, [[Configurable]]: false},\n            //   and false.\n\n            // TODO\n            // NOTE Function objects created using Function.prototype.bind do not\n            // have a prototype property or the [[Code]], [[FormalParameters]], and\n            // [[Scope]] internal properties.\n            // XXX can't delete prototype in pure-js.\n\n            // 22. Return F.\n            return bound;\n        }\n    });\n\n    // _Please note: Shortcuts are defined after `Function.prototype.bind` as we\n    // use it in defining shortcuts.\n    var owns = call.bind(ObjectPrototype.hasOwnProperty);\n    var toStr = call.bind(ObjectPrototype.toString);\n    var arraySlice = call.bind(array_slice);\n    var arraySliceApply = apply.bind(array_slice);\n    /* globals document */\n    if (typeof document === 'object' && document && document.documentElement) {\n        try {\n            arraySlice(document.documentElement.childNodes);\n        } catch (e) {\n            var origArraySlice = arraySlice;\n            var origArraySliceApply = arraySliceApply;\n            arraySlice = function arraySliceIE(arr) {\n                var r = [];\n                var i = arr.length;\n                while (i-- > 0) {\n                    r[i] = arr[i];\n                }\n                return origArraySliceApply(r, origArraySlice(arguments, 1));\n            };\n            arraySliceApply = function arraySliceApplyIE(arr, args) {\n                return origArraySliceApply(arraySlice(arr), args);\n            };\n        }\n    }\n    var strSlice = call.bind(StringPrototype.slice);\n    var strSplit = call.bind(StringPrototype.split);\n    var strIndexOf = call.bind(StringPrototype.indexOf);\n    var pushCall = call.bind(array_push);\n    var isEnum = call.bind(ObjectPrototype.propertyIsEnumerable);\n    var arraySort = call.bind(ArrayPrototype.sort);\n\n    //\n    // Array\n    // =====\n    //\n\n    var isArray = $Array.isArray || function isArray(obj) {\n        return toStr(obj) === '[object Array]';\n    };\n\n    // ES5 15.4.4.12\n    // http://es5.github.com/#x15.4.4.13\n    // Return len+argCount.\n    // [bugfix, ielt8]\n    // IE < 8 bug: [].unshift(0) === undefined but should be \"1\"\n    var hasUnshiftReturnValueBug = [].unshift(0) !== 1;\n    defineProperties(ArrayPrototype, {\n        unshift: function () {\n            array_unshift.apply(this, arguments);\n            return this.length;\n        }\n    }, hasUnshiftReturnValueBug);\n\n    // ES5 15.4.3.2\n    // http://es5.github.com/#x15.4.3.2\n    // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/isArray\n    defineProperties($Array, { isArray: isArray });\n\n    // The IsCallable() check in the Array functions\n    // has been replaced with a strict check on the\n    // internal class of the object to trap cases where\n    // the provided function was actually a regular\n    // expression literal, which in V8 and\n    // JavaScriptCore is a typeof \"function\".  Only in\n    // V8 are regular expression literals permitted as\n    // reduce parameters, so it is desirable in the\n    // general case for the shim to match the more\n    // strict and common behavior of rejecting regular\n    // expressions.\n\n    // ES5 15.4.4.18\n    // http://es5.github.com/#x15.4.4.18\n    // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/forEach\n\n    // Check failure of by-index access of string characters (IE < 9)\n    // and failure of `0 in boxedString` (Rhino)\n    var boxedString = $Object('a');\n    var splitString = boxedString[0] !== 'a' || !(0 in boxedString);\n\n    var properlyBoxesContext = function properlyBoxed(method) {\n        // Check node 0.6.21 bug where third parameter is not boxed\n        var properlyBoxesNonStrict = true;\n        var properlyBoxesStrict = true;\n        var threwException = false;\n        if (method) {\n            try {\n                method.call('foo', function (_, __, context) {\n                    if (typeof context !== 'object') {\n                        properlyBoxesNonStrict = false;\n                    }\n                });\n\n                method.call([1], function () {\n                    'use strict';\n\n                    properlyBoxesStrict = typeof this === 'string';\n                }, 'x');\n            } catch (e) {\n                threwException = true;\n            }\n        }\n        return !!method && !threwException && properlyBoxesNonStrict && properlyBoxesStrict;\n    };\n\n    defineProperties(ArrayPrototype, {\n        forEach: function forEach(callbackfn/*, thisArg*/) {\n            var object = ES.ToObject(this);\n            var self = splitString && isString(this) ? strSplit(this, '') : object;\n            var i = -1;\n            var length = ES.ToUint32(self.length);\n            var T;\n            if (arguments.length > 1) {\n                T = arguments[1];\n            }\n\n            // If no callback function or if callback is not a callable function\n            if (!isCallable(callbackfn)) {\n                throw new TypeError('Array.prototype.forEach callback must be a function');\n            }\n\n            while (++i < length) {\n                if (i in self) {\n                    // Invoke the callback function with call, passing arguments:\n                    // context, property value, property key, thisArg object\n                    if (typeof T === 'undefined') {\n                        callbackfn(self[i], i, object);\n                    } else {\n                        callbackfn.call(T, self[i], i, object);\n                    }\n                }\n            }\n        }\n    }, !properlyBoxesContext(ArrayPrototype.forEach));\n\n    // ES5 15.4.4.19\n    // http://es5.github.com/#x15.4.4.19\n    // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/map\n    defineProperties(ArrayPrototype, {\n        map: function map(callbackfn/*, thisArg*/) {\n            var object = ES.ToObject(this);\n            var self = splitString && isString(this) ? strSplit(this, '') : object;\n            var length = ES.ToUint32(self.length);\n            var result = $Array(length);\n            var T;\n            if (arguments.length > 1) {\n                T = arguments[1];\n            }\n\n            // If no callback function or if callback is not a callable function\n            if (!isCallable(callbackfn)) {\n                throw new TypeError('Array.prototype.map callback must be a function');\n            }\n\n            for (var i = 0; i < length; i++) {\n                if (i in self) {\n                    if (typeof T === 'undefined') {\n                        result[i] = callbackfn(self[i], i, object);\n                    } else {\n                        result[i] = callbackfn.call(T, self[i], i, object);\n                    }\n                }\n            }\n            return result;\n        }\n    }, !properlyBoxesContext(ArrayPrototype.map));\n\n    // ES5 15.4.4.20\n    // http://es5.github.com/#x15.4.4.20\n    // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/filter\n    defineProperties(ArrayPrototype, {\n        filter: function filter(callbackfn/*, thisArg*/) {\n            var object = ES.ToObject(this);\n            var self = splitString && isString(this) ? strSplit(this, '') : object;\n            var length = ES.ToUint32(self.length);\n            var result = [];\n            var value;\n            var T;\n            if (arguments.length > 1) {\n                T = arguments[1];\n            }\n\n            // If no callback function or if callback is not a callable function\n            if (!isCallable(callbackfn)) {\n                throw new TypeError('Array.prototype.filter callback must be a function');\n            }\n\n            for (var i = 0; i < length; i++) {\n                if (i in self) {\n                    value = self[i];\n                    if (typeof T === 'undefined' ? callbackfn(value, i, object) : callbackfn.call(T, value, i, object)) {\n                        pushCall(result, value);\n                    }\n                }\n            }\n            return result;\n        }\n    }, !properlyBoxesContext(ArrayPrototype.filter));\n\n    // ES5 15.4.4.16\n    // http://es5.github.com/#x15.4.4.16\n    // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/every\n    defineProperties(ArrayPrototype, {\n        every: function every(callbackfn/*, thisArg*/) {\n            var object = ES.ToObject(this);\n            var self = splitString && isString(this) ? strSplit(this, '') : object;\n            var length = ES.ToUint32(self.length);\n            var T;\n            if (arguments.length > 1) {\n                T = arguments[1];\n            }\n\n            // If no callback function or if callback is not a callable function\n            if (!isCallable(callbackfn)) {\n                throw new TypeError('Array.prototype.every callback must be a function');\n            }\n\n            for (var i = 0; i < length; i++) {\n                if (i in self && !(typeof T === 'undefined' ? callbackfn(self[i], i, object) : callbackfn.call(T, self[i], i, object))) {\n                    return false;\n                }\n            }\n            return true;\n        }\n    }, !properlyBoxesContext(ArrayPrototype.every));\n\n    // ES5 15.4.4.17\n    // http://es5.github.com/#x15.4.4.17\n    // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/some\n    defineProperties(ArrayPrototype, {\n        some: function some(callbackfn/*, thisArg */) {\n            var object = ES.ToObject(this);\n            var self = splitString && isString(this) ? strSplit(this, '') : object;\n            var length = ES.ToUint32(self.length);\n            var T;\n            if (arguments.length > 1) {\n                T = arguments[1];\n            }\n\n            // If no callback function or if callback is not a callable function\n            if (!isCallable(callbackfn)) {\n                throw new TypeError('Array.prototype.some callback must be a function');\n            }\n\n            for (var i = 0; i < length; i++) {\n                if (i in self && (typeof T === 'undefined' ? callbackfn(self[i], i, object) : callbackfn.call(T, self[i], i, object))) {\n                    return true;\n                }\n            }\n            return false;\n        }\n    }, !properlyBoxesContext(ArrayPrototype.some));\n\n    // ES5 15.4.4.21\n    // http://es5.github.com/#x15.4.4.21\n    // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/reduce\n    var reduceCoercesToObject = false;\n    if (ArrayPrototype.reduce) {\n        reduceCoercesToObject = typeof ArrayPrototype.reduce.call('es5', function (_, __, ___, list) {\n            return list;\n        }) === 'object';\n    }\n    defineProperties(ArrayPrototype, {\n        reduce: function reduce(callbackfn/*, initialValue*/) {\n            var object = ES.ToObject(this);\n            var self = splitString && isString(this) ? strSplit(this, '') : object;\n            var length = ES.ToUint32(self.length);\n\n            // If no callback function or if callback is not a callable function\n            if (!isCallable(callbackfn)) {\n                throw new TypeError('Array.prototype.reduce callback must be a function');\n            }\n\n            // no value to return if no initial value and an empty array\n            if (length === 0 && arguments.length === 1) {\n                throw new TypeError('reduce of empty array with no initial value');\n            }\n\n            var i = 0;\n            var result;\n            if (arguments.length >= 2) {\n                result = arguments[1];\n            } else {\n                do {\n                    if (i in self) {\n                        result = self[i++];\n                        break;\n                    }\n\n                    // if array contains no values, no initial value to return\n                    if (++i >= length) {\n                        throw new TypeError('reduce of empty array with no initial value');\n                    }\n                } while (true);\n            }\n\n            for (; i < length; i++) {\n                if (i in self) {\n                    result = callbackfn(result, self[i], i, object);\n                }\n            }\n\n            return result;\n        }\n    }, !reduceCoercesToObject);\n\n    // ES5 15.4.4.22\n    // http://es5.github.com/#x15.4.4.22\n    // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/reduceRight\n    var reduceRightCoercesToObject = false;\n    if (ArrayPrototype.reduceRight) {\n        reduceRightCoercesToObject = typeof ArrayPrototype.reduceRight.call('es5', function (_, __, ___, list) {\n            return list;\n        }) === 'object';\n    }\n    defineProperties(ArrayPrototype, {\n        reduceRight: function reduceRight(callbackfn/*, initial*/) {\n            var object = ES.ToObject(this);\n            var self = splitString && isString(this) ? strSplit(this, '') : object;\n            var length = ES.ToUint32(self.length);\n\n            // If no callback function or if callback is not a callable function\n            if (!isCallable(callbackfn)) {\n                throw new TypeError('Array.prototype.reduceRight callback must be a function');\n            }\n\n            // no value to return if no initial value, empty array\n            if (length === 0 && arguments.length === 1) {\n                throw new TypeError('reduceRight of empty array with no initial value');\n            }\n\n            var result;\n            var i = length - 1;\n            if (arguments.length >= 2) {\n                result = arguments[1];\n            } else {\n                do {\n                    if (i in self) {\n                        result = self[i--];\n                        break;\n                    }\n\n                    // if array contains no values, no initial value to return\n                    if (--i < 0) {\n                        throw new TypeError('reduceRight of empty array with no initial value');\n                    }\n                } while (true);\n            }\n\n            if (i < 0) {\n                return result;\n            }\n\n            do {\n                if (i in self) {\n                    result = callbackfn(result, self[i], i, object);\n                }\n            } while (i--);\n\n            return result;\n        }\n    }, !reduceRightCoercesToObject);\n\n    // ES5 15.4.4.14\n    // http://es5.github.com/#x15.4.4.14\n    // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf\n    var hasFirefox2IndexOfBug = ArrayPrototype.indexOf && [0, 1].indexOf(1, 2) !== -1;\n    defineProperties(ArrayPrototype, {\n        indexOf: function indexOf(searchElement/*, fromIndex */) {\n            var self = splitString && isString(this) ? strSplit(this, '') : ES.ToObject(this);\n            var length = ES.ToUint32(self.length);\n\n            if (length === 0) {\n                return -1;\n            }\n\n            var i = 0;\n            if (arguments.length > 1) {\n                i = ES.ToInteger(arguments[1]);\n            }\n\n            // handle negative indices\n            i = i >= 0 ? i : max(0, length + i);\n            for (; i < length; i++) {\n                if (i in self && self[i] === searchElement) {\n                    return i;\n                }\n            }\n            return -1;\n        }\n    }, hasFirefox2IndexOfBug);\n\n    // ES5 15.4.4.15\n    // http://es5.github.com/#x15.4.4.15\n    // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/lastIndexOf\n    var hasFirefox2LastIndexOfBug = ArrayPrototype.lastIndexOf && [0, 1].lastIndexOf(0, -3) !== -1;\n    defineProperties(ArrayPrototype, {\n        lastIndexOf: function lastIndexOf(searchElement/*, fromIndex */) {\n            var self = splitString && isString(this) ? strSplit(this, '') : ES.ToObject(this);\n            var length = ES.ToUint32(self.length);\n\n            if (length === 0) {\n                return -1;\n            }\n            var i = length - 1;\n            if (arguments.length > 1) {\n                i = min(i, ES.ToInteger(arguments[1]));\n            }\n            // handle negative indices\n            i = i >= 0 ? i : length - Math.abs(i);\n            for (; i >= 0; i--) {\n                if (i in self && searchElement === self[i]) {\n                    return i;\n                }\n            }\n            return -1;\n        }\n    }, hasFirefox2LastIndexOfBug);\n\n    // ES5 15.4.4.12\n    // http://es5.github.com/#x15.4.4.12\n    var spliceNoopReturnsEmptyArray = (function () {\n        var a = [1, 2];\n        var result = a.splice();\n        return a.length === 2 && isArray(result) && result.length === 0;\n    }());\n    defineProperties(ArrayPrototype, {\n        // Safari 5.0 bug where .splice() returns undefined\n        splice: function splice(start, deleteCount) {\n            if (arguments.length === 0) {\n                return [];\n            } else {\n                return array_splice.apply(this, arguments);\n            }\n        }\n    }, !spliceNoopReturnsEmptyArray);\n\n    var spliceWorksWithEmptyObject = (function () {\n        var obj = {};\n        ArrayPrototype.splice.call(obj, 0, 0, 1);\n        return obj.length === 1;\n    }());\n    defineProperties(ArrayPrototype, {\n        splice: function splice(start, deleteCount) {\n            if (arguments.length === 0) {\n                return [];\n            }\n            var args = arguments;\n            this.length = max(ES.ToInteger(this.length), 0);\n            if (arguments.length > 0 && typeof deleteCount !== 'number') {\n                args = arraySlice(arguments);\n                if (args.length < 2) {\n                    pushCall(args, this.length - start);\n                } else {\n                    args[1] = ES.ToInteger(deleteCount);\n                }\n            }\n            return array_splice.apply(this, args);\n        }\n    }, !spliceWorksWithEmptyObject);\n    var spliceWorksWithLargeSparseArrays = (function () {\n        // Per https://github.com/es-shims/es5-shim/issues/295\n        // Safari 7/8 breaks with sparse arrays of size 1e5 or greater\n        var arr = new $Array(1e5);\n        // note: the index MUST be 8 or larger or the test will false pass\n        arr[8] = 'x';\n        arr.splice(1, 1);\n        // note: this test must be defined *after* the indexOf shim\n        // per https://github.com/es-shims/es5-shim/issues/313\n        return arr.indexOf('x') === 7;\n    }());\n    var spliceWorksWithSmallSparseArrays = (function () {\n        // Per https://github.com/es-shims/es5-shim/issues/295\n        // Opera 12.15 breaks on this, no idea why.\n        var n = 256;\n        var arr = [];\n        arr[n] = 'a';\n        arr.splice(n + 1, 0, 'b');\n        return arr[n] === 'a';\n    }());\n    defineProperties(ArrayPrototype, {\n        splice: function splice(start, deleteCount) {\n            var O = ES.ToObject(this);\n            var A = [];\n            var len = ES.ToUint32(O.length);\n            var relativeStart = ES.ToInteger(start);\n            var actualStart = relativeStart < 0 ? max((len + relativeStart), 0) : min(relativeStart, len);\n            var actualDeleteCount = min(max(ES.ToInteger(deleteCount), 0), len - actualStart);\n\n            var k = 0;\n            var from;\n            while (k < actualDeleteCount) {\n                from = $String(actualStart + k);\n                if (owns(O, from)) {\n                    A[k] = O[from];\n                }\n                k += 1;\n            }\n\n            var items = arraySlice(arguments, 2);\n            var itemCount = items.length;\n            var to;\n            if (itemCount < actualDeleteCount) {\n                k = actualStart;\n                var maxK = len - actualDeleteCount;\n                while (k < maxK) {\n                    from = $String(k + actualDeleteCount);\n                    to = $String(k + itemCount);\n                    if (owns(O, from)) {\n                        O[to] = O[from];\n                    } else {\n                        delete O[to];\n                    }\n                    k += 1;\n                }\n                k = len;\n                var minK = len - actualDeleteCount + itemCount;\n                while (k > minK) {\n                    delete O[k - 1];\n                    k -= 1;\n                }\n            } else if (itemCount > actualDeleteCount) {\n                k = len - actualDeleteCount;\n                while (k > actualStart) {\n                    from = $String(k + actualDeleteCount - 1);\n                    to = $String(k + itemCount - 1);\n                    if (owns(O, from)) {\n                        O[to] = O[from];\n                    } else {\n                        delete O[to];\n                    }\n                    k -= 1;\n                }\n            }\n            k = actualStart;\n            for (var i = 0; i < items.length; ++i) {\n                O[k] = items[i];\n                k += 1;\n            }\n            O.length = len - actualDeleteCount + itemCount;\n\n            return A;\n        }\n    }, !spliceWorksWithLargeSparseArrays || !spliceWorksWithSmallSparseArrays);\n\n    var originalJoin = ArrayPrototype.join;\n    var hasStringJoinBug;\n    try {\n        hasStringJoinBug = Array.prototype.join.call('123', ',') !== '1,2,3';\n    } catch (e) {\n        hasStringJoinBug = true;\n    }\n    if (hasStringJoinBug) {\n        defineProperties(ArrayPrototype, {\n            join: function join(separator) {\n                var sep = typeof separator === 'undefined' ? ',' : separator;\n                return originalJoin.call(isString(this) ? strSplit(this, '') : this, sep);\n            }\n        }, hasStringJoinBug);\n    }\n\n    var hasJoinUndefinedBug = [1, 2].join(undefined) !== '1,2';\n    if (hasJoinUndefinedBug) {\n        defineProperties(ArrayPrototype, {\n            join: function join(separator) {\n                var sep = typeof separator === 'undefined' ? ',' : separator;\n                return originalJoin.call(this, sep);\n            }\n        }, hasJoinUndefinedBug);\n    }\n\n    var pushShim = function push(item) {\n        var O = ES.ToObject(this);\n        var n = ES.ToUint32(O.length);\n        var i = 0;\n        while (i < arguments.length) {\n            O[n + i] = arguments[i];\n            i += 1;\n        }\n        O.length = n + i;\n        return n + i;\n    };\n\n    var pushIsNotGeneric = (function () {\n        var obj = {};\n        var result = Array.prototype.push.call(obj, undefined);\n        return result !== 1 || obj.length !== 1 || typeof obj[0] !== 'undefined' || !owns(obj, 0);\n    }());\n    defineProperties(ArrayPrototype, {\n        push: function push(item) {\n            if (isArray(this)) {\n                return array_push.apply(this, arguments);\n            }\n            return pushShim.apply(this, arguments);\n        }\n    }, pushIsNotGeneric);\n\n    // This fixes a very weird bug in Opera 10.6 when pushing `undefined\n    var pushUndefinedIsWeird = (function () {\n        var arr = [];\n        var result = arr.push(undefined);\n        return result !== 1 || arr.length !== 1 || typeof arr[0] !== 'undefined' || !owns(arr, 0);\n    }());\n    defineProperties(ArrayPrototype, { push: pushShim }, pushUndefinedIsWeird);\n\n    // ES5 15.2.3.14\n    // http://es5.github.io/#x15.4.4.10\n    // Fix boxed string bug\n    defineProperties(ArrayPrototype, {\n        slice: function (start, end) {\n            var arr = isString(this) ? strSplit(this, '') : this;\n            return arraySliceApply(arr, arguments);\n        }\n    }, splitString);\n\n    var sortIgnoresNonFunctions = (function () {\n        try {\n            [1, 2].sort(null);\n        } catch (e) {\n            try {\n                [1, 2].sort({});\n            } catch (e2) {\n                return false;\n            }\n        }\n        return true;\n    }());\n    var sortThrowsOnRegex = (function () {\n        // this is a problem in Firefox 4, in which `typeof /a/ === 'function'`\n        try {\n            [1, 2].sort(/a/);\n            return false;\n        } catch (e) {}\n        return true;\n    }());\n    var sortIgnoresUndefined = (function () {\n        // applies in IE 8, for one.\n        try {\n            [1, 2].sort(undefined);\n            return true;\n        } catch (e) {}\n        return false;\n    }());\n    defineProperties(ArrayPrototype, {\n        sort: function sort(compareFn) {\n            if (typeof compareFn === 'undefined') {\n                return arraySort(this);\n            }\n            if (!isCallable(compareFn)) {\n                throw new TypeError('Array.prototype.sort callback must be a function');\n            }\n            return arraySort(this, compareFn);\n        }\n    }, sortIgnoresNonFunctions || !sortIgnoresUndefined || !sortThrowsOnRegex);\n\n    //\n    // Object\n    // ======\n    //\n\n    // ES5 15.2.3.14\n    // http://es5.github.com/#x15.2.3.14\n\n    // http://whattheheadsaid.com/2010/10/a-safer-object-keys-compatibility-implementation\n    var hasDontEnumBug = !isEnum({ 'toString': null }, 'toString'); // jscs:ignore disallowQuotedKeysInObjects\n    var hasProtoEnumBug = isEnum(function () {}, 'prototype');\n    var hasStringEnumBug = !owns('x', '0');\n    var equalsConstructorPrototype = function (o) {\n        var ctor = o.constructor;\n        return ctor && ctor.prototype === o;\n    };\n    var excludedKeys = {\n        $applicationCache: true,\n        $console: true,\n        $external: true,\n        $frame: true,\n        $frameElement: true,\n        $frames: true,\n        $innerHeight: true,\n        $innerWidth: true,\n        $outerHeight: true,\n        $outerWidth: true,\n        $pageXOffset: true,\n        $pageYOffset: true,\n        $parent: true,\n        $scrollLeft: true,\n        $scrollTop: true,\n        $scrollX: true,\n        $scrollY: true,\n        $self: true,\n        $webkitIndexedDB: true,\n        $webkitStorageInfo: true,\n        $window: true,\n\n        $width: true,\n        $height: true,\n        $top: true,\n        $localStorage: true\n    };\n    var hasAutomationEqualityBug = (function () {\n        /* globals window */\n        if (typeof window === 'undefined') {\n            return false;\n        }\n        for (var k in window) {\n            try {\n                if (!excludedKeys['$' + k] && owns(window, k) && window[k] !== null && typeof window[k] === 'object') {\n                    equalsConstructorPrototype(window[k]);\n                }\n            } catch (e) {\n                return true;\n            }\n        }\n        return false;\n    }());\n    var equalsConstructorPrototypeIfNotBuggy = function (object) {\n        if (typeof window === 'undefined' || !hasAutomationEqualityBug) {\n            return equalsConstructorPrototype(object);\n        }\n        try {\n            return equalsConstructorPrototype(object);\n        } catch (e) {\n            return false;\n        }\n    };\n    var dontEnums = [\n        'toString',\n        'toLocaleString',\n        'valueOf',\n        'hasOwnProperty',\n        'isPrototypeOf',\n        'propertyIsEnumerable',\n        'constructor'\n    ];\n    var dontEnumsLength = dontEnums.length;\n\n    // taken directly from https://github.com/ljharb/is-arguments/blob/master/index.js\n    // can be replaced with require('is-arguments') if we ever use a build process instead\n    var isStandardArguments = function isArguments(value) {\n        return toStr(value) === '[object Arguments]';\n    };\n    var isLegacyArguments = function isArguments(value) {\n        return value !== null\n            && typeof value === 'object'\n            && typeof value.length === 'number'\n            && value.length >= 0\n            && !isArray(value)\n            && isCallable(value.callee);\n    };\n    var isArguments = isStandardArguments(arguments) ? isStandardArguments : isLegacyArguments;\n\n    defineProperties($Object, {\n        keys: function keys(object) {\n            var isFn = isCallable(object);\n            var isArgs = isArguments(object);\n            var isObject = object !== null && typeof object === 'object';\n            var isStr = isObject && isString(object);\n\n            if (!isObject && !isFn && !isArgs) {\n                throw new TypeError('Object.keys called on a non-object');\n            }\n\n            var theKeys = [];\n            var skipProto = hasProtoEnumBug && isFn;\n            if ((isStr && hasStringEnumBug) || isArgs) {\n                for (var i = 0; i < object.length; ++i) {\n                    pushCall(theKeys, $String(i));\n                }\n            }\n\n            if (!isArgs) {\n                for (var name in object) {\n                    if (!(skipProto && name === 'prototype') && owns(object, name)) {\n                        pushCall(theKeys, $String(name));\n                    }\n                }\n            }\n\n            if (hasDontEnumBug) {\n                var skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);\n                for (var j = 0; j < dontEnumsLength; j++) {\n                    var dontEnum = dontEnums[j];\n                    if (!(skipConstructor && dontEnum === 'constructor') && owns(object, dontEnum)) {\n                        pushCall(theKeys, dontEnum);\n                    }\n                }\n            }\n            return theKeys;\n        }\n    });\n\n    var keysWorksWithArguments = $Object.keys && (function () {\n        // Safari 5.0 bug\n        return $Object.keys(arguments).length === 2;\n    }(1, 2));\n    var keysHasArgumentsLengthBug = $Object.keys && (function () {\n        var argKeys = $Object.keys(arguments);\n        return arguments.length !== 1 || argKeys.length !== 1 || argKeys[0] !== 1;\n    }(1));\n    var originalKeys = $Object.keys;\n    defineProperties($Object, {\n        keys: function keys(object) {\n            if (isArguments(object)) {\n                return originalKeys(arraySlice(object));\n            } else {\n                return originalKeys(object);\n            }\n        }\n    }, !keysWorksWithArguments || keysHasArgumentsLengthBug);\n\n    //\n    // Date\n    // ====\n    //\n\n    var hasNegativeMonthYearBug = new Date(-3509827329600292).getUTCMonth() !== 0;\n    var aNegativeTestDate = new Date(-1509842289600292);\n    var aPositiveTestDate = new Date(1449662400000);\n    var hasToUTCStringFormatBug = aNegativeTestDate.toUTCString() !== 'Mon, 01 Jan -45875 11:59:59 GMT';\n    var hasToDateStringFormatBug;\n    var hasToStringFormatBug;\n    var timeZoneOffset = aNegativeTestDate.getTimezoneOffset();\n    if (timeZoneOffset < -720) {\n        hasToDateStringFormatBug = aNegativeTestDate.toDateString() !== 'Tue Jan 02 -45875';\n        hasToStringFormatBug = !(/^Thu Dec 10 2015 \\d\\d:\\d\\d:\\d\\d GMT[-+]\\d\\d\\d\\d(?: |$)/).test(String(aPositiveTestDate));\n    } else {\n        hasToDateStringFormatBug = aNegativeTestDate.toDateString() !== 'Mon Jan 01 -45875';\n        hasToStringFormatBug = !(/^Wed Dec 09 2015 \\d\\d:\\d\\d:\\d\\d GMT[-+]\\d\\d\\d\\d(?: |$)/).test(String(aPositiveTestDate));\n    }\n\n    var originalGetFullYear = call.bind(Date.prototype.getFullYear);\n    var originalGetMonth = call.bind(Date.prototype.getMonth);\n    var originalGetDate = call.bind(Date.prototype.getDate);\n    var originalGetUTCFullYear = call.bind(Date.prototype.getUTCFullYear);\n    var originalGetUTCMonth = call.bind(Date.prototype.getUTCMonth);\n    var originalGetUTCDate = call.bind(Date.prototype.getUTCDate);\n    var originalGetUTCDay = call.bind(Date.prototype.getUTCDay);\n    var originalGetUTCHours = call.bind(Date.prototype.getUTCHours);\n    var originalGetUTCMinutes = call.bind(Date.prototype.getUTCMinutes);\n    var originalGetUTCSeconds = call.bind(Date.prototype.getUTCSeconds);\n    var originalGetUTCMilliseconds = call.bind(Date.prototype.getUTCMilliseconds);\n    var dayName = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];\n    var monthName = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];\n    var daysInMonth = function daysInMonth(month, year) {\n        return originalGetDate(new Date(year, month, 0));\n    };\n\n    defineProperties(Date.prototype, {\n        getFullYear: function getFullYear() {\n            if (!this || !(this instanceof Date)) {\n                throw new TypeError('this is not a Date object.');\n            }\n            var year = originalGetFullYear(this);\n            if (year < 0 && originalGetMonth(this) > 11) {\n                return year + 1;\n            }\n            return year;\n        },\n        getMonth: function getMonth() {\n            if (!this || !(this instanceof Date)) {\n                throw new TypeError('this is not a Date object.');\n            }\n            var year = originalGetFullYear(this);\n            var month = originalGetMonth(this);\n            if (year < 0 && month > 11) {\n                return 0;\n            }\n            return month;\n        },\n        getDate: function getDate() {\n            if (!this || !(this instanceof Date)) {\n                throw new TypeError('this is not a Date object.');\n            }\n            var year = originalGetFullYear(this);\n            var month = originalGetMonth(this);\n            var date = originalGetDate(this);\n            if (year < 0 && month > 11) {\n                if (month === 12) {\n                    return date;\n                }\n                var days = daysInMonth(0, year + 1);\n                return (days - date) + 1;\n            }\n            return date;\n        },\n        getUTCFullYear: function getUTCFullYear() {\n            if (!this || !(this instanceof Date)) {\n                throw new TypeError('this is not a Date object.');\n            }\n            var year = originalGetUTCFullYear(this);\n            if (year < 0 && originalGetUTCMonth(this) > 11) {\n                return year + 1;\n            }\n            return year;\n        },\n        getUTCMonth: function getUTCMonth() {\n            if (!this || !(this instanceof Date)) {\n                throw new TypeError('this is not a Date object.');\n            }\n            var year = originalGetUTCFullYear(this);\n            var month = originalGetUTCMonth(this);\n            if (year < 0 && month > 11) {\n                return 0;\n            }\n            return month;\n        },\n        getUTCDate: function getUTCDate() {\n            if (!this || !(this instanceof Date)) {\n                throw new TypeError('this is not a Date object.');\n            }\n            var year = originalGetUTCFullYear(this);\n            var month = originalGetUTCMonth(this);\n            var date = originalGetUTCDate(this);\n            if (year < 0 && month > 11) {\n                if (month === 12) {\n                    return date;\n                }\n                var days = daysInMonth(0, year + 1);\n                return (days - date) + 1;\n            }\n            return date;\n        }\n    }, hasNegativeMonthYearBug);\n\n    defineProperties(Date.prototype, {\n        toUTCString: function toUTCString() {\n            if (!this || !(this instanceof Date)) {\n                throw new TypeError('this is not a Date object.');\n            }\n            var day = originalGetUTCDay(this);\n            var date = originalGetUTCDate(this);\n            var month = originalGetUTCMonth(this);\n            var year = originalGetUTCFullYear(this);\n            var hour = originalGetUTCHours(this);\n            var minute = originalGetUTCMinutes(this);\n            var second = originalGetUTCSeconds(this);\n            return dayName[day] + ', '\n                + (date < 10 ? '0' + date : date) + ' '\n                + monthName[month] + ' '\n                + year + ' '\n                + (hour < 10 ? '0' + hour : hour) + ':'\n                + (minute < 10 ? '0' + minute : minute) + ':'\n                + (second < 10 ? '0' + second : second) + ' GMT';\n        }\n    }, hasNegativeMonthYearBug || hasToUTCStringFormatBug);\n\n    // Opera 12 has `,`\n    defineProperties(Date.prototype, {\n        toDateString: function toDateString() {\n            if (!this || !(this instanceof Date)) {\n                throw new TypeError('this is not a Date object.');\n            }\n            var day = this.getDay();\n            var date = this.getDate();\n            var month = this.getMonth();\n            var year = this.getFullYear();\n            return dayName[day] + ' '\n                + monthName[month] + ' '\n                + (date < 10 ? '0' + date : date) + ' '\n                + year;\n        }\n    }, hasNegativeMonthYearBug || hasToDateStringFormatBug);\n\n    // can't use defineProperties here because of toString enumeration issue in IE <= 8\n    if (hasNegativeMonthYearBug || hasToStringFormatBug) {\n        Date.prototype.toString = function toString() {\n            if (!this || !(this instanceof Date)) {\n                throw new TypeError('this is not a Date object.');\n            }\n            var day = this.getDay();\n            var date = this.getDate();\n            var month = this.getMonth();\n            var year = this.getFullYear();\n            var hour = this.getHours();\n            var minute = this.getMinutes();\n            var second = this.getSeconds();\n            var timezoneOffset = this.getTimezoneOffset();\n            var hoursOffset = Math.floor(Math.abs(timezoneOffset) / 60);\n            var minutesOffset = Math.floor(Math.abs(timezoneOffset) % 60);\n            return dayName[day] + ' '\n                + monthName[month] + ' '\n                + (date < 10 ? '0' + date : date) + ' '\n                + year + ' '\n                + (hour < 10 ? '0' + hour : hour) + ':'\n                + (minute < 10 ? '0' + minute : minute) + ':'\n                + (second < 10 ? '0' + second : second) + ' GMT'\n                + (timezoneOffset > 0 ? '-' : '+')\n                + (hoursOffset < 10 ? '0' + hoursOffset : hoursOffset)\n                + (minutesOffset < 10 ? '0' + minutesOffset : minutesOffset);\n        };\n        if (supportsDescriptors) {\n            $Object.defineProperty(Date.prototype, 'toString', {\n                configurable: true,\n                enumerable: false,\n                writable: true\n            });\n        }\n    }\n\n    // ES5 15.9.5.43\n    // http://es5.github.com/#x15.9.5.43\n    // This function returns a String value represent the instance in time\n    // represented by this Date object. The format of the String is the Date Time\n    // string format defined in 15.9.1.15. All fields are present in the String.\n    // The time zone is always UTC, denoted by the suffix Z. If the time value of\n    // this object is not a finite Number a RangeError exception is thrown.\n    var negativeDate = -62198755200000;\n    var negativeYearString = '-000001';\n    var hasNegativeDateBug = Date.prototype.toISOString && new Date(negativeDate).toISOString().indexOf(negativeYearString) === -1; // eslint-disable-line max-len\n    var hasSafari51DateBug = Date.prototype.toISOString && new Date(-1).toISOString() !== '1969-12-31T23:59:59.999Z';\n\n    var getTime = call.bind(Date.prototype.getTime);\n\n    defineProperties(Date.prototype, {\n        toISOString: function toISOString() {\n            if (!isFinite(this) || !isFinite(getTime(this))) {\n                // Adope Photoshop requires the second check.\n                throw new RangeError('Date.prototype.toISOString called on non-finite value.');\n            }\n\n            var year = originalGetUTCFullYear(this);\n\n            var month = originalGetUTCMonth(this);\n            // see https://github.com/es-shims/es5-shim/issues/111\n            year += Math.floor(month / 12);\n            month = ((month % 12) + 12) % 12;\n\n            // the date time string format is specified in 15.9.1.15.\n            var result = [\n                month + 1,\n                originalGetUTCDate(this),\n                originalGetUTCHours(this),\n                originalGetUTCMinutes(this),\n                originalGetUTCSeconds(this)\n            ];\n            year = (\n                (year < 0 ? '-' : (year > 9999 ? '+' : ''))\n                + strSlice('00000' + Math.abs(year), (0 <= year && year <= 9999) ? -4 : -6)\n            );\n\n            for (var i = 0; i < result.length; ++i) {\n                // pad months, days, hours, minutes, and seconds to have two digits.\n                result[i] = strSlice('00' + result[i], -2);\n            }\n            // pad milliseconds to have three digits.\n            return (\n                year + '-' + arraySlice(result, 0, 2).join('-')\n                + 'T' + arraySlice(result, 2).join(':') + '.'\n                + strSlice('000' + originalGetUTCMilliseconds(this), -3) + 'Z'\n            );\n        }\n    }, hasNegativeDateBug || hasSafari51DateBug);\n\n    // ES5 15.9.5.44\n    // http://es5.github.com/#x15.9.5.44\n    // This function provides a String representation of a Date object for use by\n    // JSON.stringify (15.12.3).\n    var dateToJSONIsSupported = (function () {\n        try {\n            return Date.prototype.toJSON\n                && new Date(NaN).toJSON() === null\n                && new Date(negativeDate).toJSON().indexOf(negativeYearString) !== -1\n                && Date.prototype.toJSON.call({ // generic\n                    toISOString: function () { return true; }\n                });\n        } catch (e) {\n            return false;\n        }\n    }());\n    if (!dateToJSONIsSupported) {\n        Date.prototype.toJSON = function toJSON(key) {\n            // When the toJSON method is called with argument key, the following\n            // steps are taken:\n\n            // 1.  Let O be the result of calling ToObject, giving it the this\n            // value as its argument.\n            // 2. Let tv be ES.ToPrimitive(O, hint Number).\n            var O = $Object(this);\n            var tv = ES.ToPrimitive(O);\n            // 3. If tv is a Number and is not finite, return null.\n            if (typeof tv === 'number' && !isFinite(tv)) {\n                return null;\n            }\n            // 4. Let toISO be the result of calling the [[Get]] internal method of\n            // O with argument \"toISOString\".\n            var toISO = O.toISOString;\n            // 5. If IsCallable(toISO) is false, throw a TypeError exception.\n            if (!isCallable(toISO)) {\n                throw new TypeError('toISOString property is not callable');\n            }\n            // 6. Return the result of calling the [[Call]] internal method of\n            //  toISO with O as the this value and an empty argument list.\n            return toISO.call(O);\n\n            // NOTE 1 The argument is ignored.\n\n            // NOTE 2 The toJSON function is intentionally generic; it does not\n            // require that its this value be a Date object. Therefore, it can be\n            // transferred to other kinds of objects for use as a method. However,\n            // it does require that any such object have a toISOString method. An\n            // object is free to use the argument key to filter its\n            // stringification.\n        };\n    }\n\n    // ES5 15.9.4.2\n    // http://es5.github.com/#x15.9.4.2\n    // based on work shared by Daniel Friesen (dantman)\n    // http://gist.github.com/303249\n    var supportsExtendedYears = Date.parse('+033658-09-27T01:46:40.000Z') === 1e15;\n    var acceptsInvalidDates = !isNaN(Date.parse('2012-04-04T24:00:00.500Z')) || !isNaN(Date.parse('2012-11-31T23:59:59.000Z')) || !isNaN(Date.parse('2012-12-31T23:59:60.000Z'));\n    var doesNotParseY2KNewYear = isNaN(Date.parse('2000-01-01T00:00:00.000Z'));\n    if (doesNotParseY2KNewYear || acceptsInvalidDates || !supportsExtendedYears) {\n        // XXX global assignment won't work in embeddings that use\n        // an alternate object for the context.\n        /* global Date: true */\n        var maxSafeUnsigned32Bit = Math.pow(2, 31) - 1;\n        var hasSafariSignedIntBug = isActualNaN(new Date(1970, 0, 1, 0, 0, 0, maxSafeUnsigned32Bit + 1).getTime());\n        // eslint-disable-next-line no-implicit-globals, no-global-assign\n        Date = (function (NativeDate) {\n            // Date.length === 7\n            var DateShim = function Date(Y, M, D, h, m, s, ms) {\n                var length = arguments.length;\n                var date;\n                if (this instanceof NativeDate) {\n                    var seconds = s;\n                    var millis = ms;\n                    if (hasSafariSignedIntBug && length >= 7 && ms > maxSafeUnsigned32Bit) {\n                        // work around a Safari 8/9 bug where it treats the seconds as signed\n                        var msToShift = Math.floor(ms / maxSafeUnsigned32Bit) * maxSafeUnsigned32Bit;\n                        var sToShift = Math.floor(msToShift / 1e3);\n                        seconds += sToShift;\n                        millis -= sToShift * 1e3;\n                    }\n                    date = length === 1 && $String(Y) === Y // isString(Y)\n                        // We explicitly pass it through parse:\n                        ? new NativeDate(DateShim.parse(Y))\n                        // We have to manually make calls depending on argument\n                        // length here\n                        : length >= 7 ? new NativeDate(Y, M, D, h, m, seconds, millis)\n                            : length >= 6 ? new NativeDate(Y, M, D, h, m, seconds)\n                                : length >= 5 ? new NativeDate(Y, M, D, h, m)\n                                    : length >= 4 ? new NativeDate(Y, M, D, h)\n                                        : length >= 3 ? new NativeDate(Y, M, D)\n                                            : length >= 2 ? new NativeDate(Y, M)\n                                                : length >= 1 ? new NativeDate(Y instanceof NativeDate ? +Y : Y)\n                                                    : new NativeDate();\n                } else {\n                    date = NativeDate.apply(this, arguments);\n                }\n                if (!isPrimitive(date)) {\n                    // Prevent mixups with unfixed Date object\n                    defineProperties(date, { constructor: DateShim }, true);\n                }\n                return date;\n            };\n\n            // 15.9.1.15 Date Time String Format.\n            var isoDateExpression = new RegExp('^'\n                + '(\\\\d{4}|[+-]\\\\d{6})' // four-digit year capture or sign + 6-digit extended year\n                + '(?:-(\\\\d{2})' // optional month capture\n                + '(?:-(\\\\d{2})' // optional day capture\n                + '(?:' // capture hours:minutes:seconds.milliseconds\n                    + 'T(\\\\d{2})' // hours capture\n                    + ':(\\\\d{2})' // minutes capture\n                    + '(?:' // optional :seconds.milliseconds\n                        + ':(\\\\d{2})' // seconds capture\n                        + '(?:(\\\\.\\\\d{1,}))?' // milliseconds capture\n                    + ')?'\n                + '(' // capture UTC offset component\n                    + 'Z|' // UTC capture\n                    + '(?:' // offset specifier +/-hours:minutes\n                        + '([-+])' // sign capture\n                        + '(\\\\d{2})' // hours offset capture\n                        + ':(\\\\d{2})' // minutes offset capture\n                    + ')'\n                + ')?)?)?)?'\n            + '$');\n\n            var months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365];\n\n            var dayFromMonth = function dayFromMonth(year, month) {\n                var t = month > 1 ? 1 : 0;\n                return (\n                    months[month]\n                    + Math.floor((year - 1969 + t) / 4)\n                    - Math.floor((year - 1901 + t) / 100)\n                    + Math.floor((year - 1601 + t) / 400)\n                    + (365 * (year - 1970))\n                );\n            };\n\n            var toUTC = function toUTC(t) {\n                var s = 0;\n                var ms = t;\n                if (hasSafariSignedIntBug && ms > maxSafeUnsigned32Bit) {\n                    // work around a Safari 8/9 bug where it treats the seconds as signed\n                    var msToShift = Math.floor(ms / maxSafeUnsigned32Bit) * maxSafeUnsigned32Bit;\n                    var sToShift = Math.floor(msToShift / 1e3);\n                    s += sToShift;\n                    ms -= sToShift * 1e3;\n                }\n                return $Number(new NativeDate(1970, 0, 1, 0, 0, s, ms));\n            };\n\n            // Copy any custom methods a 3rd party library may have added\n            for (var key in NativeDate) {\n                if (owns(NativeDate, key)) {\n                    DateShim[key] = NativeDate[key];\n                }\n            }\n\n            // Copy \"native\" methods explicitly; they may be non-enumerable\n            defineProperties(DateShim, {\n                now: NativeDate.now,\n                UTC: NativeDate.UTC\n            }, true);\n            DateShim.prototype = NativeDate.prototype;\n            defineProperties(DateShim.prototype, { constructor: DateShim }, true);\n\n            // Upgrade Date.parse to handle simplified ISO 8601 strings\n            var parseShim = function parse(string) {\n                var match = isoDateExpression.exec(string);\n                if (match) {\n                    // parse months, days, hours, minutes, seconds, and milliseconds\n                    // provide default values if necessary\n                    // parse the UTC offset component\n                    var year = $Number(match[1]),\n                        month = $Number(match[2] || 1) - 1,\n                        day = $Number(match[3] || 1) - 1,\n                        hour = $Number(match[4] || 0),\n                        minute = $Number(match[5] || 0),\n                        second = $Number(match[6] || 0),\n                        millisecond = Math.floor($Number(match[7] || 0) * 1000),\n                        // When time zone is missed, local offset should be used\n                        // (ES 5.1 bug)\n                        // see https://bugs.ecmascript.org/show_bug.cgi?id=112\n                        isLocalTime = Boolean(match[4] && !match[8]),\n                        signOffset = match[9] === '-' ? 1 : -1,\n                        hourOffset = $Number(match[10] || 0),\n                        minuteOffset = $Number(match[11] || 0),\n                        result;\n                    var hasMinutesOrSecondsOrMilliseconds = minute > 0 || second > 0 || millisecond > 0;\n                    if (\n                        hour < (hasMinutesOrSecondsOrMilliseconds ? 24 : 25)\n                        && minute < 60 && second < 60 && millisecond < 1000\n                        && month > -1 && month < 12 && hourOffset < 24\n                        && minuteOffset < 60 // detect invalid offsets\n                        && day > -1\n                        && day < (dayFromMonth(year, month + 1) - dayFromMonth(year, month))\n                    ) {\n                        result = (\n                            ((dayFromMonth(year, month) + day) * 24)\n                            + hour\n                            + (hourOffset * signOffset)\n                        ) * 60;\n                        result = ((\n                            ((result + minute + (minuteOffset * signOffset)) * 60)\n                            + second\n                        ) * 1000) + millisecond;\n                        if (isLocalTime) {\n                            result = toUTC(result);\n                        }\n                        if (-8.64e15 <= result && result <= 8.64e15) {\n                            return result;\n                        }\n                    }\n                    return NaN;\n                }\n                return NativeDate.parse.apply(this, arguments);\n            };\n            defineProperties(DateShim, { parse: parseShim });\n\n            return DateShim;\n        }(Date));\n        /* global Date: false */\n    }\n\n    // ES5 15.9.4.4\n    // http://es5.github.com/#x15.9.4.4\n    if (!Date.now) {\n        Date.now = function now() {\n            return new Date().getTime();\n        };\n    }\n\n    //\n    // Number\n    // ======\n    //\n\n    // ES5.1 15.7.4.5\n    // http://es5.github.com/#x15.7.4.5\n    var hasToFixedBugs = NumberPrototype.toFixed && (\n        (0.00008).toFixed(3) !== '0.000'\n        || (0.9).toFixed(0) !== '1'\n        || (1.255).toFixed(2) !== '1.25'\n        || (1000000000000000128).toFixed(0) !== '1000000000000000128'\n    );\n\n    var toFixedHelpers = {\n        base: 1e7,\n        size: 6,\n        data: [0, 0, 0, 0, 0, 0],\n        multiply: function multiply(n, c) {\n            var i = -1;\n            var c2 = c;\n            while (++i < toFixedHelpers.size) {\n                c2 += n * toFixedHelpers.data[i];\n                toFixedHelpers.data[i] = c2 % toFixedHelpers.base;\n                c2 = Math.floor(c2 / toFixedHelpers.base);\n            }\n        },\n        divide: function divide(n) {\n            var i = toFixedHelpers.size;\n            var c = 0;\n            while (--i >= 0) {\n                c += toFixedHelpers.data[i];\n                toFixedHelpers.data[i] = Math.floor(c / n);\n                c = (c % n) * toFixedHelpers.base;\n            }\n        },\n        numToString: function numToString() {\n            var i = toFixedHelpers.size;\n            var s = '';\n            while (--i >= 0) {\n                if (s !== '' || i === 0 || toFixedHelpers.data[i] !== 0) {\n                    var t = $String(toFixedHelpers.data[i]);\n                    if (s === '') {\n                        s = t;\n                    } else {\n                        s += strSlice('0000000', 0, 7 - t.length) + t;\n                    }\n                }\n            }\n            return s;\n        },\n        pow: function pow(x, n, acc) {\n            return (n === 0 ? acc : (n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc)));\n        },\n        log: function log(x) {\n            var n = 0;\n            var x2 = x;\n            while (x2 >= 4096) {\n                n += 12;\n                x2 /= 4096;\n            }\n            while (x2 >= 2) {\n                n += 1;\n                x2 /= 2;\n            }\n            return n;\n        }\n    };\n\n    var toFixedShim = function toFixed(fractionDigits) {\n        var f, x, s, m, e, z, j, k;\n\n        // Test for NaN and round fractionDigits down\n        f = $Number(fractionDigits);\n        f = isActualNaN(f) ? 0 : Math.floor(f);\n\n        if (f < 0 || f > 20) {\n            throw new RangeError('Number.toFixed called with invalid number of decimals');\n        }\n\n        x = $Number(this);\n\n        if (isActualNaN(x)) {\n            return 'NaN';\n        }\n\n        // If it is too big or small, return the string value of the number\n        if (x <= -1e21 || x >= 1e21) {\n            return $String(x);\n        }\n\n        s = '';\n\n        if (x < 0) {\n            s = '-';\n            x = -x;\n        }\n\n        m = '0';\n\n        if (x > 1e-21) {\n            // 1e-21 < x < 1e21\n            // -70 < log2(x) < 70\n            e = toFixedHelpers.log(x * toFixedHelpers.pow(2, 69, 1)) - 69;\n            z = (e < 0 ? x * toFixedHelpers.pow(2, -e, 1) : x / toFixedHelpers.pow(2, e, 1));\n            z *= 0x10000000000000; // Math.pow(2, 52);\n            e = 52 - e;\n\n            // -18 < e < 122\n            // x = z / 2 ^ e\n            if (e > 0) {\n                toFixedHelpers.multiply(0, z);\n                j = f;\n\n                while (j >= 7) {\n                    toFixedHelpers.multiply(1e7, 0);\n                    j -= 7;\n                }\n\n                toFixedHelpers.multiply(toFixedHelpers.pow(10, j, 1), 0);\n                j = e - 1;\n\n                while (j >= 23) {\n                    toFixedHelpers.divide(1 << 23);\n                    j -= 23;\n                }\n\n                toFixedHelpers.divide(1 << j);\n                toFixedHelpers.multiply(1, 1);\n                toFixedHelpers.divide(2);\n                m = toFixedHelpers.numToString();\n            } else {\n                toFixedHelpers.multiply(0, z);\n                toFixedHelpers.multiply(1 << (-e), 0);\n                m = toFixedHelpers.numToString() + strSlice('0.00000000000000000000', 2, 2 + f);\n            }\n        }\n\n        if (f > 0) {\n            k = m.length;\n\n            if (k <= f) {\n                m = s + strSlice('0.0000000000000000000', 0, f - k + 2) + m;\n            } else {\n                m = s + strSlice(m, 0, k - f) + '.' + strSlice(m, k - f);\n            }\n        } else {\n            m = s + m;\n        }\n\n        return m;\n    };\n    defineProperties(NumberPrototype, { toFixed: toFixedShim }, hasToFixedBugs);\n\n    var hasToPrecisionUndefinedBug = (function () {\n        try {\n            return 1.0.toPrecision(undefined) === '1';\n        } catch (e) {\n            return true;\n        }\n    }());\n    var originalToPrecision = NumberPrototype.toPrecision;\n    defineProperties(NumberPrototype, {\n        toPrecision: function toPrecision(precision) {\n            return typeof precision === 'undefined' ? originalToPrecision.call(this) : originalToPrecision.call(this, precision);\n        }\n    }, hasToPrecisionUndefinedBug);\n\n    //\n    // String\n    // ======\n    //\n\n    // ES5 15.5.4.14\n    // http://es5.github.com/#x15.5.4.14\n\n    // [bugfix, IE lt 9, firefox 4, Konqueror, Opera, obscure browsers]\n    // Many browsers do not split properly with regular expressions or they\n    // do not perform the split correctly under obscure conditions.\n    // See http://blog.stevenlevithan.com/archives/cross-browser-split\n    // I've tested in many browsers and this seems to cover the deviant ones:\n    //    'ab'.split(/(?:ab)*/) should be [\"\", \"\"], not [\"\"]\n    //    '.'.split(/(.?)(.?)/) should be [\"\", \".\", \"\", \"\"], not [\"\", \"\"]\n    //    'tesst'.split(/(s)*/) should be [\"t\", undefined, \"e\", \"s\", \"t\"], not\n    //       [undefined, \"t\", undefined, \"e\", ...]\n    //    ''.split(/.?/) should be [], not [\"\"]\n    //    '.'.split(/()()/) should be [\".\"], not [\"\", \"\", \".\"]\n\n    if (\n        'ab'.split(/(?:ab)*/).length !== 2\n        || '.'.split(/(.?)(.?)/).length !== 4\n        || 'tesst'.split(/(s)*/)[1] === 't'\n        || 'test'.split(/(?:)/, -1).length !== 4\n        || ''.split(/.?/).length\n        || '.'.split(/()()/).length > 1\n    ) {\n        (function () {\n            var compliantExecNpcg = typeof (/()??/).exec('')[1] === 'undefined'; // NPCG: nonparticipating capturing group\n            var maxSafe32BitInt = Math.pow(2, 32) - 1;\n\n            StringPrototype.split = function (separator, limit) {\n                var string = String(this);\n                if (typeof separator === 'undefined' && limit === 0) {\n                    return [];\n                }\n\n                // If `separator` is not a regex, use native split\n                if (!isRegex(separator)) {\n                    return strSplit(this, separator, limit);\n                }\n\n                var output = [];\n                var flags = (separator.ignoreCase ? 'i' : '')\n                            + (separator.multiline ? 'm' : '')\n                            + (separator.unicode ? 'u' : '') // in ES6\n                            + (separator.sticky ? 'y' : ''), // Firefox 3+ and ES6\n                    lastLastIndex = 0,\n                    // Make `global` and avoid `lastIndex` issues by working with a copy\n                    separator2, match, lastIndex, lastLength;\n                var separatorCopy = new RegExp(separator.source, flags + 'g');\n                if (!compliantExecNpcg) {\n                    // Doesn't need flags gy, but they don't hurt\n                    separator2 = new RegExp('^' + separatorCopy.source + '$(?!\\\\s)', flags);\n                }\n                /* Values for `limit`, per the spec:\n                 * If undefined: 4294967295 // maxSafe32BitInt\n                 * If 0, Infinity, or NaN: 0\n                 * If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296;\n                 * If negative number: 4294967296 - Math.floor(Math.abs(limit))\n                 * If other: Type-convert, then use the above rules\n                 */\n                var splitLimit = typeof limit === 'undefined' ? maxSafe32BitInt : ES.ToUint32(limit);\n                match = separatorCopy.exec(string);\n                while (match) {\n                    // `separatorCopy.lastIndex` is not reliable cross-browser\n                    lastIndex = match.index + match[0].length;\n                    if (lastIndex > lastLastIndex) {\n                        pushCall(output, strSlice(string, lastLastIndex, match.index));\n                        // Fix browsers whose `exec` methods don't consistently return `undefined` for\n                        // nonparticipating capturing groups\n                        if (!compliantExecNpcg && match.length > 1) {\n                            /* eslint-disable no-loop-func */\n                            match[0].replace(separator2, function () {\n                                for (var i = 1; i < arguments.length - 2; i++) {\n                                    if (typeof arguments[i] === 'undefined') {\n                                        match[i] = void 0;\n                                    }\n                                }\n                            });\n                            /* eslint-enable no-loop-func */\n                        }\n                        if (match.length > 1 && match.index < string.length) {\n                            array_push.apply(output, arraySlice(match, 1));\n                        }\n                        lastLength = match[0].length;\n                        lastLastIndex = lastIndex;\n                        if (output.length >= splitLimit) {\n                            break;\n                        }\n                    }\n                    if (separatorCopy.lastIndex === match.index) {\n                        separatorCopy.lastIndex++; // Avoid an infinite loop\n                    }\n                    match = separatorCopy.exec(string);\n                }\n                if (lastLastIndex === string.length) {\n                    if (lastLength || !separatorCopy.test('')) {\n                        pushCall(output, '');\n                    }\n                } else {\n                    pushCall(output, strSlice(string, lastLastIndex));\n                }\n                return output.length > splitLimit ? arraySlice(output, 0, splitLimit) : output;\n            };\n        }());\n\n    // [bugfix, chrome]\n    // If separator is undefined, then the result array contains just one String,\n    // which is the this value (converted to a String). If limit is not undefined,\n    // then the output array is truncated so that it contains no more than limit\n    // elements.\n    // \"0\".split(undefined, 0) -> []\n    } else if ('0'.split(void 0, 0).length) {\n        StringPrototype.split = function split(separator, limit) {\n            if (typeof separator === 'undefined' && limit === 0) {\n                return [];\n            }\n            return strSplit(this, separator, limit);\n        };\n    }\n\n    var str_replace = StringPrototype.replace;\n    var replaceReportsGroupsCorrectly = (function () {\n        var groups = [];\n        'x'.replace(/x(.)?/g, function (match, group) {\n            pushCall(groups, group);\n        });\n        return groups.length === 1 && typeof groups[0] === 'undefined';\n    }());\n\n    if (!replaceReportsGroupsCorrectly) {\n        StringPrototype.replace = function replace(searchValue, replaceValue) {\n            var isFn = isCallable(replaceValue);\n            var hasCapturingGroups = isRegex(searchValue) && (/\\)[*?]/).test(searchValue.source);\n            if (!isFn || !hasCapturingGroups) {\n                return str_replace.call(this, searchValue, replaceValue);\n            } else {\n                var wrappedReplaceValue = function (match) {\n                    var length = arguments.length;\n                    var originalLastIndex = searchValue.lastIndex;\n                    searchValue.lastIndex = 0;\n                    var args = searchValue.exec(match) || [];\n                    searchValue.lastIndex = originalLastIndex;\n                    pushCall(args, arguments[length - 2], arguments[length - 1]);\n                    return replaceValue.apply(this, args);\n                };\n                return str_replace.call(this, searchValue, wrappedReplaceValue);\n            }\n        };\n    }\n\n    // ECMA-262, 3rd B.2.3\n    // Not an ECMAScript standard, although ECMAScript 3rd Edition has a\n    // non-normative section suggesting uniform semantics and it should be\n    // normalized across all browsers\n    // [bugfix, IE lt 9] IE < 9 substr() with negative value not working in IE\n    var string_substr = StringPrototype.substr;\n    var hasNegativeSubstrBug = ''.substr && '0b'.substr(-1) !== 'b';\n    defineProperties(StringPrototype, {\n        substr: function substr(start, length) {\n            var normalizedStart = start;\n            if (start < 0) {\n                normalizedStart = max(this.length + start, 0);\n            }\n            return string_substr.call(this, normalizedStart, length);\n        }\n    }, hasNegativeSubstrBug);\n\n    // ES5 15.5.4.20\n    // whitespace from: http://es5.github.io/#x15.5.4.20\n    var ws = '\\x09\\x0A\\x0B\\x0C\\x0D\\x20\\xA0\\u1680\\u180E\\u2000\\u2001\\u2002\\u2003'\n        + '\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028'\n        + '\\u2029\\uFEFF';\n    var zeroWidth = '\\u200b';\n    var wsRegexChars = '[' + ws + ']';\n    var trimBeginRegexp = new RegExp('^' + wsRegexChars + wsRegexChars + '*');\n    var trimEndRegexp = new RegExp(wsRegexChars + wsRegexChars + '*$');\n    var hasTrimWhitespaceBug = StringPrototype.trim && (ws.trim() || !zeroWidth.trim());\n    defineProperties(StringPrototype, {\n        // http://blog.stevenlevithan.com/archives/faster-trim-javascript\n        // http://perfectionkills.com/whitespace-deviations/\n        trim: function trim() {\n            if (typeof this === 'undefined' || this === null) {\n                throw new TypeError(\"can't convert \" + this + ' to object');\n            }\n            return $String(this).replace(trimBeginRegexp, '').replace(trimEndRegexp, '');\n        }\n    }, hasTrimWhitespaceBug);\n    var trim = call.bind(String.prototype.trim);\n\n    var hasLastIndexBug = StringPrototype.lastIndexOf && 'abcあい'.lastIndexOf('あい', 2) !== -1;\n    defineProperties(StringPrototype, {\n        lastIndexOf: function lastIndexOf(searchString) {\n            if (typeof this === 'undefined' || this === null) {\n                throw new TypeError(\"can't convert \" + this + ' to object');\n            }\n            var S = $String(this);\n            var searchStr = $String(searchString);\n            var numPos = arguments.length > 1 ? $Number(arguments[1]) : NaN;\n            var pos = isActualNaN(numPos) ? Infinity : ES.ToInteger(numPos);\n            var start = min(max(pos, 0), S.length);\n            var searchLen = searchStr.length;\n            var k = start + searchLen;\n            while (k > 0) {\n                k = max(0, k - searchLen);\n                var index = strIndexOf(strSlice(S, k, start + searchLen), searchStr);\n                if (index !== -1) {\n                    return k + index;\n                }\n            }\n            return -1;\n        }\n    }, hasLastIndexBug);\n\n    var originalLastIndexOf = StringPrototype.lastIndexOf;\n    defineProperties(StringPrototype, {\n        lastIndexOf: function lastIndexOf(searchString) {\n            return originalLastIndexOf.apply(this, arguments);\n        }\n    }, StringPrototype.lastIndexOf.length !== 1);\n\n    // ES-5 15.1.2.2\n    // eslint-disable-next-line radix\n    if (parseInt(ws + '08') !== 8 || parseInt(ws + '0x16') !== 22) {\n        /* global parseInt: true */\n        parseInt = (function (origParseInt) {\n            var hexRegex = /^[-+]?0[xX]/;\n            return function parseInt(str, radix) {\n                if (typeof str === 'symbol') {\n                    // handle Symbols in node 8.3/8.4\n                    // eslint-disable-next-line no-implicit-coercion, no-unused-expressions\n                    '' + str; // jscs:ignore disallowImplicitTypeConversion\n                }\n\n                var string = trim(String(str));\n                var defaultedRadix = $Number(radix) || (hexRegex.test(string) ? 16 : 10);\n                return origParseInt(string, defaultedRadix);\n            };\n        }(parseInt));\n    }\n\n    // https://es5.github.io/#x15.1.2.3\n    if (1 / parseFloat('-0') !== -Infinity) {\n        /* global parseFloat: true */\n        parseFloat = (function (origParseFloat) {\n            return function parseFloat(string) {\n                var inputString = trim(String(string));\n                var result = origParseFloat(inputString);\n                return result === 0 && strSlice(inputString, 0, 1) === '-' ? -0 : result;\n            };\n        }(parseFloat));\n    }\n\n    if (String(new RangeError('test')) !== 'RangeError: test') {\n        var errorToStringShim = function toString() {\n            if (typeof this === 'undefined' || this === null) {\n                throw new TypeError(\"can't convert \" + this + ' to object');\n            }\n            var name = this.name;\n            if (typeof name === 'undefined') {\n                name = 'Error';\n            } else if (typeof name !== 'string') {\n                name = $String(name);\n            }\n            var msg = this.message;\n            if (typeof msg === 'undefined') {\n                msg = '';\n            } else if (typeof msg !== 'string') {\n                msg = $String(msg);\n            }\n            if (!name) {\n                return msg;\n            }\n            if (!msg) {\n                return name;\n            }\n            return name + ': ' + msg;\n        };\n        // can't use defineProperties here because of toString enumeration issue in IE <= 8\n        Error.prototype.toString = errorToStringShim;\n    }\n\n    if (supportsDescriptors) {\n        var ensureNonEnumerable = function (obj, prop) {\n            if (isEnum(obj, prop)) {\n                var desc = Object.getOwnPropertyDescriptor(obj, prop);\n                if (desc.configurable) {\n                    desc.enumerable = false;\n                    Object.defineProperty(obj, prop, desc);\n                }\n            }\n        };\n        ensureNonEnumerable(Error.prototype, 'message');\n        if (Error.prototype.message !== '') {\n            Error.prototype.message = '';\n        }\n        ensureNonEnumerable(Error.prototype, 'name');\n    }\n\n    if (String(/a/mig) !== '/a/gim') {\n        var regexToString = function toString() {\n            var str = '/' + this.source + '/';\n            if (this.global) {\n                str += 'g';\n            }\n            if (this.ignoreCase) {\n                str += 'i';\n            }\n            if (this.multiline) {\n                str += 'm';\n            }\n            return str;\n        };\n        // can't use defineProperties here because of toString enumeration issue in IE <= 8\n        RegExp.prototype.toString = regexToString;\n    }\n}));\n","/*!\n * https://github.com/es-shims/es5-shim\n * @license es5-shim Copyright 2009-2015 by contributors, MIT License\n * see https://github.com/es-shims/es5-shim/blob/master/LICENSE\n */\n\n// vim: ts=4 sts=4 sw=4 expandtab\n\n// Add semicolon to prevent IIFE from being passed as argument to concatenated code.\n;\n\n// UMD (Universal Module Definition)\n// see https://github.com/umdjs/umd/blob/master/templates/returnExports.js\n(function (root, factory) {\n    'use strict';\n\n    /* global define, exports, module */\n    if (typeof define === 'function' && define.amd) {\n        // AMD. Register as an anonymous module.\n        define(factory);\n    } else if (typeof exports === 'object') {\n        // Node. Does not work with strict CommonJS, but\n        // only CommonJS-like enviroments that support module.exports,\n        // like Node.\n        module.exports = factory();\n    } else {\n        // Browser globals (root is window)\n        root.returnExports = factory();\n    }\n}(this, function () {\n\n    var call = Function.call;\n    var prototypeOfObject = Object.prototype;\n    var owns = call.bind(prototypeOfObject.hasOwnProperty);\n    var isEnumerable = call.bind(prototypeOfObject.propertyIsEnumerable);\n    var toStr = call.bind(prototypeOfObject.toString);\n\n    // If JS engine supports accessors creating shortcuts.\n    var defineGetter;\n    var defineSetter;\n    var lookupGetter;\n    var lookupSetter;\n    var supportsAccessors = owns(prototypeOfObject, '__defineGetter__');\n    if (supportsAccessors) {\n        /* eslint-disable no-underscore-dangle, no-restricted-properties */\n        defineGetter = call.bind(prototypeOfObject.__defineGetter__);\n        defineSetter = call.bind(prototypeOfObject.__defineSetter__);\n        lookupGetter = call.bind(prototypeOfObject.__lookupGetter__);\n        lookupSetter = call.bind(prototypeOfObject.__lookupSetter__);\n        /* eslint-enable no-underscore-dangle, no-restricted-properties */\n    }\n\n    var isPrimitive = function isPrimitive(o) {\n        return o == null || (typeof o !== 'object' && typeof o !== 'function');\n    };\n\n    // ES5 15.2.3.2\n    // http://es5.github.com/#x15.2.3.2\n    if (!Object.getPrototypeOf) {\n        // https://github.com/es-shims/es5-shim/issues#issue/2\n        // http://ejohn.org/blog/objectgetprototypeof/\n        // recommended by fschaefer on github\n        //\n        // sure, and webreflection says ^_^\n        // ... this will nerever possibly return null\n        // ... Opera Mini breaks here with infinite loops\n        Object.getPrototypeOf = function getPrototypeOf(object) {\n            // eslint-disable-next-line no-proto\n            var proto = object.__proto__;\n            if (proto || proto === null) {\n                return proto;\n            } else if (toStr(object.constructor) === '[object Function]') {\n                return object.constructor.prototype;\n            } else if (object instanceof Object) {\n                return prototypeOfObject;\n            } else {\n                // Correctly return null for Objects created with `Object.create(null)`\n                // (shammed or native) or `{ __proto__: null}`.  Also returns null for\n                // cross-realm objects on browsers that lack `__proto__` support (like\n                // IE <11), but that's the best we can do.\n                return null;\n            }\n        };\n    }\n\n    // ES5 15.2.3.3\n    // http://es5.github.com/#x15.2.3.3\n\n    var doesGetOwnPropertyDescriptorWork = function doesGetOwnPropertyDescriptorWork(object) {\n        try {\n            object.sentinel = 0;\n            return Object.getOwnPropertyDescriptor(object, 'sentinel').value === 0;\n        } catch (exception) {\n            return false;\n        }\n    };\n\n    // check whether getOwnPropertyDescriptor works if it's given. Otherwise, shim partially.\n    if (Object.defineProperty) {\n        var getOwnPropertyDescriptorWorksOnObject = doesGetOwnPropertyDescriptorWork({});\n        var getOwnPropertyDescriptorWorksOnDom = typeof document === 'undefined'\n            || doesGetOwnPropertyDescriptorWork(document.createElement('div'));\n        if (!getOwnPropertyDescriptorWorksOnDom || !getOwnPropertyDescriptorWorksOnObject) {\n            var getOwnPropertyDescriptorFallback = Object.getOwnPropertyDescriptor;\n        }\n    }\n\n    if (!Object.getOwnPropertyDescriptor || getOwnPropertyDescriptorFallback) {\n        var ERR_NON_OBJECT = 'Object.getOwnPropertyDescriptor called on a non-object: ';\n\n        /* eslint-disable no-proto */\n        Object.getOwnPropertyDescriptor = function getOwnPropertyDescriptor(object, property) {\n            if (isPrimitive(object)) {\n                throw new TypeError(ERR_NON_OBJECT + object);\n            }\n\n            // make a valiant attempt to use the real getOwnPropertyDescriptor\n            // for I8's DOM elements.\n            if (getOwnPropertyDescriptorFallback) {\n                try {\n                    return getOwnPropertyDescriptorFallback.call(Object, object, property);\n                } catch (exception) {\n                    // try the shim if the real one doesn't work\n                }\n            }\n\n            var descriptor;\n\n            // If object does not owns property return undefined immediately.\n            if (!owns(object, property)) {\n                return descriptor;\n            }\n\n            // If object has a property then it's for sure `configurable`, and\n            // probably `enumerable`. Detect enumerability though.\n            descriptor = {\n                enumerable: isEnumerable(object, property),\n                configurable: true\n            };\n\n            // If JS engine supports accessor properties then property may be a\n            // getter or setter.\n            if (supportsAccessors) {\n                // Unfortunately `__lookupGetter__` will return a getter even\n                // if object has own non getter property along with a same named\n                // inherited getter. To avoid misbehavior we temporary remove\n                // `__proto__` so that `__lookupGetter__` will return getter only\n                // if it's owned by an object.\n                var prototype = object.__proto__;\n                var notPrototypeOfObject = object !== prototypeOfObject;\n                // avoid recursion problem, breaking in Opera Mini when\n                // Object.getOwnPropertyDescriptor(Object.prototype, 'toString')\n                // or any other Object.prototype accessor\n                if (notPrototypeOfObject) {\n                    object.__proto__ = prototypeOfObject;\n                }\n\n                var getter = lookupGetter(object, property);\n                var setter = lookupSetter(object, property);\n\n                if (notPrototypeOfObject) {\n                    // Once we have getter and setter we can put values back.\n                    object.__proto__ = prototype;\n                }\n\n                if (getter || setter) {\n                    if (getter) {\n                        descriptor.get = getter;\n                    }\n                    if (setter) {\n                        descriptor.set = setter;\n                    }\n                    // If it was accessor property we're done and return here\n                    // in order to avoid adding `value` to the descriptor.\n                    return descriptor;\n                }\n            }\n\n            // If we got this far we know that object has an own property that is\n            // not an accessor so we set it as a value and return descriptor.\n            descriptor.value = object[property];\n            descriptor.writable = true;\n            return descriptor;\n        };\n        /* eslint-enable no-proto */\n    }\n\n    // ES5 15.2.3.4\n    // http://es5.github.com/#x15.2.3.4\n    if (!Object.getOwnPropertyNames) {\n        Object.getOwnPropertyNames = function getOwnPropertyNames(object) {\n            return Object.keys(object);\n        };\n    }\n\n    // ES5 15.2.3.5\n    // http://es5.github.com/#x15.2.3.5\n    if (!Object.create) {\n\n        // Contributed by Brandon Benvie, October, 2012\n        var createEmpty;\n        var supportsProto = !({ __proto__: null } instanceof Object);\n        // the following produces false positives\n        // in Opera Mini => not a reliable check\n        // Object.prototype.__proto__ === null\n\n        // Check for document.domain and active x support\n        // No need to use active x approach when document.domain is not set\n        // see https://github.com/es-shims/es5-shim/issues/150\n        // variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346\n        /* global ActiveXObject */\n        var shouldUseActiveX = function shouldUseActiveX() {\n            // return early if document.domain not set\n            if (!document.domain) {\n                return false;\n            }\n\n            try {\n                return !!new ActiveXObject('htmlfile');\n            } catch (exception) {\n                return false;\n            }\n        };\n\n        // This supports IE8 when document.domain is used\n        // see https://github.com/es-shims/es5-shim/issues/150\n        // variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346\n        var getEmptyViaActiveX = function getEmptyViaActiveX() {\n            var empty;\n            var xDoc;\n\n            xDoc = new ActiveXObject('htmlfile');\n\n            var script = 'script';\n            xDoc.write('<' + script + '></' + script + '>');\n            xDoc.close();\n\n            empty = xDoc.parentWindow.Object.prototype;\n            xDoc = null;\n\n            return empty;\n        };\n\n        // The original implementation using an iframe\n        // before the activex approach was added\n        // see https://github.com/es-shims/es5-shim/issues/150\n        var getEmptyViaIFrame = function getEmptyViaIFrame() {\n            var iframe = document.createElement('iframe');\n            var parent = document.body || document.documentElement;\n            var empty;\n\n            iframe.style.display = 'none';\n            parent.appendChild(iframe);\n            // eslint-disable-next-line no-script-url\n            iframe.src = 'javascript:';\n\n            empty = iframe.contentWindow.Object.prototype;\n            parent.removeChild(iframe);\n            iframe = null;\n\n            return empty;\n        };\n\n        /* global document */\n        if (supportsProto || typeof document === 'undefined') {\n            createEmpty = function () {\n                return { __proto__: null };\n            };\n        } else {\n            // In old IE __proto__ can't be used to manually set `null`, nor does\n            // any other method exist to make an object that inherits from nothing,\n            // aside from Object.prototype itself. Instead, create a new global\n            // object and *steal* its Object.prototype and strip it bare. This is\n            // used as the prototype to create nullary objects.\n            createEmpty = function () {\n                // Determine which approach to use\n                // see https://github.com/es-shims/es5-shim/issues/150\n                var empty = shouldUseActiveX() ? getEmptyViaActiveX() : getEmptyViaIFrame();\n\n                delete empty.constructor;\n                delete empty.hasOwnProperty;\n                delete empty.propertyIsEnumerable;\n                delete empty.isPrototypeOf;\n                delete empty.toLocaleString;\n                delete empty.toString;\n                delete empty.valueOf;\n\n                var Empty = function Empty() {};\n                Empty.prototype = empty;\n                // short-circuit future calls\n                createEmpty = function () {\n                    return new Empty();\n                };\n                return new Empty();\n            };\n        }\n\n        Object.create = function create(prototype, properties) {\n\n            var object;\n            var Type = function Type() {}; // An empty constructor.\n\n            if (prototype === null) {\n                object = createEmpty();\n            } else {\n                if (prototype !== null && isPrimitive(prototype)) {\n                    // In the native implementation `parent` can be `null`\n                    // OR *any* `instanceof Object`  (Object|Function|Array|RegExp|etc)\n                    // Use `typeof` tho, b/c in old IE, DOM elements are not `instanceof Object`\n                    // like they are in modern browsers. Using `Object.create` on DOM elements\n                    // is...err...probably inappropriate, but the native version allows for it.\n                    throw new TypeError('Object prototype may only be an Object or null'); // same msg as Chrome\n                }\n                Type.prototype = prototype;\n                object = new Type();\n                // IE has no built-in implementation of `Object.getPrototypeOf`\n                // neither `__proto__`, but this manually setting `__proto__` will\n                // guarantee that `Object.getPrototypeOf` will work as expected with\n                // objects created using `Object.create`\n                // eslint-disable-next-line no-proto\n                object.__proto__ = prototype;\n            }\n\n            if (properties !== void 0) {\n                Object.defineProperties(object, properties);\n            }\n\n            return object;\n        };\n    }\n\n    // ES5 15.2.3.6\n    // http://es5.github.com/#x15.2.3.6\n\n    // Patch for WebKit and IE8 standard mode\n    // Designed by hax <hax.github.com>\n    // related issue: https://github.com/es-shims/es5-shim/issues#issue/5\n    // IE8 Reference:\n    //     http://msdn.microsoft.com/en-us/library/dd282900.aspx\n    //     http://msdn.microsoft.com/en-us/library/dd229916.aspx\n    // WebKit Bugs:\n    //     https://bugs.webkit.org/show_bug.cgi?id=36423\n\n    var doesDefinePropertyWork = function doesDefinePropertyWork(object) {\n        try {\n            Object.defineProperty(object, 'sentinel', {});\n            return 'sentinel' in object;\n        } catch (exception) {\n            return false;\n        }\n    };\n\n    // check whether defineProperty works if it's given. Otherwise,\n    // shim partially.\n    if (Object.defineProperty) {\n        var definePropertyWorksOnObject = doesDefinePropertyWork({});\n        var definePropertyWorksOnDom = typeof document === 'undefined'\n            || doesDefinePropertyWork(document.createElement('div'));\n        if (!definePropertyWorksOnObject || !definePropertyWorksOnDom) {\n            var definePropertyFallback = Object.defineProperty,\n                definePropertiesFallback = Object.defineProperties;\n        }\n    }\n\n    if (!Object.defineProperty || definePropertyFallback) {\n        var ERR_NON_OBJECT_DESCRIPTOR = 'Property description must be an object: ';\n        var ERR_NON_OBJECT_TARGET = 'Object.defineProperty called on non-object: ';\n        var ERR_ACCESSORS_NOT_SUPPORTED = 'getters & setters can not be defined on this javascript engine';\n\n        Object.defineProperty = function defineProperty(object, property, descriptor) {\n            if (isPrimitive(object)) {\n                throw new TypeError(ERR_NON_OBJECT_TARGET + object);\n            }\n            if (isPrimitive(descriptor)) {\n                throw new TypeError(ERR_NON_OBJECT_DESCRIPTOR + descriptor);\n            }\n            // make a valiant attempt to use the real defineProperty\n            // for I8's DOM elements.\n            if (definePropertyFallback) {\n                try {\n                    return definePropertyFallback.call(Object, object, property, descriptor);\n                } catch (exception) {\n                    // try the shim if the real one doesn't work\n                }\n            }\n\n            // If it's a data property.\n            if ('value' in descriptor) {\n                // fail silently if 'writable', 'enumerable', or 'configurable'\n                // are requested but not supported\n                /*\n                // alternate approach:\n                if ( // can't implement these features; allow false but not true\n                    ('writable' in descriptor && !descriptor.writable) ||\n                    ('enumerable' in descriptor && !descriptor.enumerable) ||\n                    ('configurable' in descriptor && !descriptor.configurable)\n                ))\n                    throw new RangeError(\n                        'This implementation of Object.defineProperty does not support configurable, enumerable, or writable.'\n                    );\n                */\n\n                if (supportsAccessors && (lookupGetter(object, property) || lookupSetter(object, property))) {\n                    // As accessors are supported only on engines implementing\n                    // `__proto__` we can safely override `__proto__` while defining\n                    // a property to make sure that we don't hit an inherited\n                    // accessor.\n                    /* eslint-disable no-proto */\n                    var prototype = object.__proto__;\n                    object.__proto__ = prototypeOfObject;\n                    // Deleting a property anyway since getter / setter may be\n                    // defined on object itself.\n                    delete object[property];\n                    object[property] = descriptor.value;\n                    // Setting original `__proto__` back now.\n                    object.__proto__ = prototype;\n                    /* eslint-enable no-proto */\n                } else {\n                    object[property] = descriptor.value;\n                }\n            } else {\n                var hasGetter = 'get' in descriptor;\n                var hasSetter = 'set' in descriptor;\n                if (!supportsAccessors && (hasGetter || hasSetter)) {\n                    throw new TypeError(ERR_ACCESSORS_NOT_SUPPORTED);\n                }\n                // If we got that far then getters and setters can be defined !!\n                if (hasGetter) {\n                    defineGetter(object, property, descriptor.get);\n                }\n                if (hasSetter) {\n                    defineSetter(object, property, descriptor.set);\n                }\n            }\n            return object;\n        };\n    }\n\n    // ES5 15.2.3.7\n    // http://es5.github.com/#x15.2.3.7\n    if (!Object.defineProperties || definePropertiesFallback) {\n        Object.defineProperties = function defineProperties(object, properties) {\n            // make a valiant attempt to use the real defineProperties\n            if (definePropertiesFallback) {\n                try {\n                    return definePropertiesFallback.call(Object, object, properties);\n                } catch (exception) {\n                    // try the shim if the real one doesn't work\n                }\n            }\n\n            Object.keys(properties).forEach(function (property) {\n                if (property !== '__proto__') {\n                    Object.defineProperty(object, property, properties[property]);\n                }\n            });\n            return object;\n        };\n    }\n\n    // ES5 15.2.3.8\n    // http://es5.github.com/#x15.2.3.8\n    if (!Object.seal) {\n        Object.seal = function seal(object) {\n            if (Object(object) !== object) {\n                throw new TypeError('Object.seal can only be called on Objects.');\n            }\n            // this is misleading and breaks feature-detection, but\n            // allows \"securable\" code to \"gracefully\" degrade to working\n            // but insecure code.\n            return object;\n        };\n    }\n\n    // ES5 15.2.3.9\n    // http://es5.github.com/#x15.2.3.9\n    if (!Object.freeze) {\n        Object.freeze = function freeze(object) {\n            if (Object(object) !== object) {\n                throw new TypeError('Object.freeze can only be called on Objects.');\n            }\n            // this is misleading and breaks feature-detection, but\n            // allows \"securable\" code to \"gracefully\" degrade to working\n            // but insecure code.\n            return object;\n        };\n    }\n\n    // detect a Rhino bug and patch it\n    try {\n        Object.freeze(function () {});\n    } catch (exception) {\n        Object.freeze = (function (freezeObject) {\n            return function freeze(object) {\n                if (typeof object === 'function') {\n                    return object;\n                } else {\n                    return freezeObject(object);\n                }\n            };\n        }(Object.freeze));\n    }\n\n    // ES5 15.2.3.10\n    // http://es5.github.com/#x15.2.3.10\n    if (!Object.preventExtensions) {\n        Object.preventExtensions = function preventExtensions(object) {\n            if (Object(object) !== object) {\n                throw new TypeError('Object.preventExtensions can only be called on Objects.');\n            }\n            // this is misleading and breaks feature-detection, but\n            // allows \"securable\" code to \"gracefully\" degrade to working\n            // but insecure code.\n            return object;\n        };\n    }\n\n    // ES5 15.2.3.11\n    // http://es5.github.com/#x15.2.3.11\n    if (!Object.isSealed) {\n        Object.isSealed = function isSealed(object) {\n            if (Object(object) !== object) {\n                throw new TypeError('Object.isSealed can only be called on Objects.');\n            }\n            return false;\n        };\n    }\n\n    // ES5 15.2.3.12\n    // http://es5.github.com/#x15.2.3.12\n    if (!Object.isFrozen) {\n        Object.isFrozen = function isFrozen(object) {\n            if (Object(object) !== object) {\n                throw new TypeError('Object.isFrozen can only be called on Objects.');\n            }\n            return false;\n        };\n    }\n\n    // ES5 15.2.3.13\n    // http://es5.github.com/#x15.2.3.13\n    if (!Object.isExtensible) {\n        Object.isExtensible = function isExtensible(object) {\n            // 1. If Type(O) is not Object throw a TypeError exception.\n            if (Object(object) !== object) {\n                throw new TypeError('Object.isExtensible can only be called on Objects.');\n            }\n            // 2. Return the Boolean value of the [[Extensible]] internal property of O.\n            var name = '';\n            while (owns(object, name)) {\n                name += '?';\n            }\n            object[name] = true;\n            var returnValue = owns(object, name);\n            delete object[name];\n            return returnValue;\n        };\n    }\n\n}));\n","/*!\n * https://github.com/paulmillr/es6-shim\n * @license es6-shim Copyright 2013-2016 by Paul Miller (http://paulmillr.com)\n *   and contributors,  MIT License\n * es6-shim: v0.35.4\n * see https://github.com/paulmillr/es6-shim/blob/0.35.3/LICENSE\n * Details and documentation:\n * https://github.com/paulmillr/es6-shim/\n */\n\n// UMD (Universal Module Definition)\n// see https://github.com/umdjs/umd/blob/master/returnExports.js\n(function (root, factory) {\n  /*global define, module, exports */\n  if (typeof define === 'function' && define.amd) {\n    // AMD. Register as an anonymous module.\n    define(factory);\n  } else if (typeof exports === 'object') {\n    // Node. Does not work with strict CommonJS, but\n    // only CommonJS-like environments that support module.exports,\n    // like Node.\n    module.exports = factory();\n  } else {\n    // Browser globals (root is window)\n    root.returnExports = factory();\n  }\n}(this, function () {\n  'use strict';\n\n  var _apply = Function.call.bind(Function.apply);\n  var _call = Function.call.bind(Function.call);\n  var isArray = Array.isArray;\n  var keys = Object.keys;\n\n  var not = function notThunker(func) {\n    return function notThunk() {\n      return !_apply(func, this, arguments);\n    };\n  };\n  var throwsError = function (func) {\n    try {\n      func();\n      return false;\n    } catch (e) {\n      return true;\n    }\n  };\n  var valueOrFalseIfThrows = function valueOrFalseIfThrows(func) {\n    try {\n      return func();\n    } catch (e) {\n      return false;\n    }\n  };\n\n  var isCallableWithoutNew = not(throwsError);\n  var arePropertyDescriptorsSupported = function () {\n    // if Object.defineProperty exists but throws, it's IE 8\n    return !throwsError(function () {\n      return Object.defineProperty({}, 'x', { get: function () { } }); // eslint-disable-line getter-return\n    });\n  };\n  var supportsDescriptors = !!Object.defineProperty && arePropertyDescriptorsSupported();\n  var functionsHaveNames = (function foo() {}).name === 'foo'; // eslint-disable-line no-extra-parens\n\n  var _forEach = Function.call.bind(Array.prototype.forEach);\n  var _reduce = Function.call.bind(Array.prototype.reduce);\n  var _filter = Function.call.bind(Array.prototype.filter);\n  var _some = Function.call.bind(Array.prototype.some);\n\n  var defineProperty = function (object, name, value, force) {\n    if (!force && name in object) { return; }\n    if (supportsDescriptors) {\n      Object.defineProperty(object, name, {\n        configurable: true,\n        enumerable: false,\n        writable: true,\n        value: value\n      });\n    } else {\n      object[name] = value;\n    }\n  };\n\n  // Define configurable, writable and non-enumerable props\n  // if they don’t exist.\n  var defineProperties = function (object, map, forceOverride) {\n    _forEach(keys(map), function (name) {\n      var method = map[name];\n      defineProperty(object, name, method, !!forceOverride);\n    });\n  };\n\n  var _toString = Function.call.bind(Object.prototype.toString);\n  var isCallable = typeof /abc/ === 'function' ? function IsCallableSlow(x) {\n    // Some old browsers (IE, FF) say that typeof /abc/ === 'function'\n    return typeof x === 'function' && _toString(x) === '[object Function]';\n  } : function IsCallableFast(x) { return typeof x === 'function'; };\n\n  var Value = {\n    getter: function (object, name, getter) {\n      if (!supportsDescriptors) {\n        throw new TypeError('getters require true ES5 support');\n      }\n      Object.defineProperty(object, name, {\n        configurable: true,\n        enumerable: false,\n        get: getter\n      });\n    },\n    proxy: function (originalObject, key, targetObject) {\n      if (!supportsDescriptors) {\n        throw new TypeError('getters require true ES5 support');\n      }\n      var originalDescriptor = Object.getOwnPropertyDescriptor(originalObject, key);\n      Object.defineProperty(targetObject, key, {\n        configurable: originalDescriptor.configurable,\n        enumerable: originalDescriptor.enumerable,\n        get: function getKey() { return originalObject[key]; },\n        set: function setKey(value) { originalObject[key] = value; }\n      });\n    },\n    redefine: function (object, property, newValue) {\n      if (supportsDescriptors) {\n        var descriptor = Object.getOwnPropertyDescriptor(object, property);\n        descriptor.value = newValue;\n        Object.defineProperty(object, property, descriptor);\n      } else {\n        object[property] = newValue;\n      }\n    },\n    defineByDescriptor: function (object, property, descriptor) {\n      if (supportsDescriptors) {\n        Object.defineProperty(object, property, descriptor);\n      } else if ('value' in descriptor) {\n        object[property] = descriptor.value;\n      }\n    },\n    preserveToString: function (target, source) {\n      if (source && isCallable(source.toString)) {\n        defineProperty(target, 'toString', source.toString.bind(source), true);\n      }\n    }\n  };\n\n  // Simple shim for Object.create on ES3 browsers\n  // (unlike real shim, no attempt to support `prototype === null`)\n  var create = Object.create || function (prototype, properties) {\n    var Prototype = function Prototype() {};\n    Prototype.prototype = prototype;\n    var object = new Prototype();\n    if (typeof properties !== 'undefined') {\n      keys(properties).forEach(function (key) {\n        Value.defineByDescriptor(object, key, properties[key]);\n      });\n    }\n    return object;\n  };\n\n  var supportsSubclassing = function (C, f) {\n    if (!Object.setPrototypeOf) { return false; /* skip test on IE < 11 */ }\n    return valueOrFalseIfThrows(function () {\n      var Sub = function Subclass(arg) {\n        var o = new C(arg);\n        Object.setPrototypeOf(o, Subclass.prototype);\n        return o;\n      };\n      Object.setPrototypeOf(Sub, C);\n      Sub.prototype = create(C.prototype, {\n        constructor: { value: Sub }\n      });\n      return f(Sub);\n    });\n  };\n\n  var getGlobal = function () {\n    /* global self, window, global */\n    // the only reliable means to get the global object is\n    // `Function('return this')()`\n    // However, this causes CSP violations in Chrome apps.\n    if (typeof self !== 'undefined') { return self; }\n    if (typeof window !== 'undefined') { return window; }\n    if (typeof global !== 'undefined') { return global; }\n    throw new Error('unable to locate global object');\n  };\n\n  var globals = getGlobal();\n  var globalIsFinite = globals.isFinite;\n  var _indexOf = Function.call.bind(String.prototype.indexOf);\n  var _arrayIndexOfApply = Function.apply.bind(Array.prototype.indexOf);\n  var _concat = Function.call.bind(Array.prototype.concat);\n  // var _sort = Function.call.bind(Array.prototype.sort);\n  var _strSlice = Function.call.bind(String.prototype.slice);\n  var _push = Function.call.bind(Array.prototype.push);\n  var _pushApply = Function.apply.bind(Array.prototype.push);\n  var _shift = Function.call.bind(Array.prototype.shift);\n  var _max = Math.max;\n  var _min = Math.min;\n  var _floor = Math.floor;\n  var _abs = Math.abs;\n  var _exp = Math.exp;\n  var _log = Math.log;\n  var _sqrt = Math.sqrt;\n  var _hasOwnProperty = Function.call.bind(Object.prototype.hasOwnProperty);\n  var ArrayIterator; // make our implementation private\n  var noop = function () {};\n\n  var OrigMap = globals.Map;\n  var origMapDelete = OrigMap && OrigMap.prototype['delete'];\n  var origMapGet = OrigMap && OrigMap.prototype.get;\n  var origMapHas = OrigMap && OrigMap.prototype.has;\n  var origMapSet = OrigMap && OrigMap.prototype.set;\n\n  var Symbol = globals.Symbol || {};\n  var symbolSpecies = Symbol.species || '@@species';\n\n  var numberIsNaN = Number.isNaN || function isNaN(value) {\n    // NaN !== NaN, but they are identical.\n    // NaNs are the only non-reflexive value, i.e., if x !== x,\n    // then x is NaN.\n    // isNaN is broken: it converts its argument to number, so\n    // isNaN('foo') => true\n    return value !== value;\n  };\n  var numberIsFinite = Number.isFinite || function isFinite(value) {\n    return typeof value === 'number' && globalIsFinite(value);\n  };\n  var _sign = isCallable(Math.sign) ? Math.sign : function sign(value) {\n    var number = Number(value);\n    if (number === 0) { return number; }\n    if (numberIsNaN(number)) { return number; }\n    return number < 0 ? -1 : 1;\n  };\n  var _log1p = function log1p(value) {\n    var x = Number(value);\n    if (x < -1 || numberIsNaN(x)) { return NaN; }\n    if (x === 0 || x === Infinity) { return x; }\n    if (x === -1) { return -Infinity; }\n\n    return (1 + x) - 1 === 0 ? x : x * (_log(1 + x) / ((1 + x) - 1));\n  };\n\n  // taken directly from https://github.com/ljharb/is-arguments/blob/master/index.js\n  // can be replaced with require('is-arguments') if we ever use a build process instead\n  var isStandardArguments = function isArguments(value) {\n    return _toString(value) === '[object Arguments]';\n  };\n  var isLegacyArguments = function isArguments(value) {\n    return value !== null &&\n      typeof value === 'object' &&\n      typeof value.length === 'number' &&\n      value.length >= 0 &&\n      _toString(value) !== '[object Array]' &&\n      _toString(value.callee) === '[object Function]';\n  };\n  var isArguments = isStandardArguments(arguments) ? isStandardArguments : isLegacyArguments;\n\n  var Type = {\n    primitive: function (x) { return x === null || (typeof x !== 'function' && typeof x !== 'object'); },\n    string: function (x) { return _toString(x) === '[object String]'; },\n    regex: function (x) { return _toString(x) === '[object RegExp]'; },\n    symbol: function (x) {\n      return typeof globals.Symbol === 'function' && typeof x === 'symbol';\n    }\n  };\n\n  var overrideNative = function overrideNative(object, property, replacement) {\n    var original = object[property];\n    defineProperty(object, property, replacement, true);\n    Value.preserveToString(object[property], original);\n  };\n\n  // eslint-disable-next-line no-restricted-properties\n  var hasSymbols = typeof Symbol === 'function' && typeof Symbol['for'] === 'function' && Type.symbol(Symbol());\n\n  // This is a private name in the es6 spec, equal to '[Symbol.iterator]'\n  // we're going to use an arbitrary _-prefixed name to make our shims\n  // work properly with each other, even though we don't have full Iterator\n  // support.  That is, `Array.from(map.keys())` will work, but we don't\n  // pretend to export a \"real\" Iterator interface.\n  var $iterator$ = Type.symbol(Symbol.iterator) ? Symbol.iterator : '_es6-shim iterator_';\n  // Firefox ships a partial implementation using the name @@iterator.\n  // https://bugzilla.mozilla.org/show_bug.cgi?id=907077#c14\n  // So use that name if we detect it.\n  if (globals.Set && typeof new globals.Set()['@@iterator'] === 'function') {\n    $iterator$ = '@@iterator';\n  }\n\n  // Reflect\n  if (!globals.Reflect) {\n    defineProperty(globals, 'Reflect', {}, true);\n  }\n  var Reflect = globals.Reflect;\n\n  var $String = String;\n\n  /* global document */\n  var domAll = (typeof document === 'undefined' || !document) ? null : document.all;\n  var isNullOrUndefined = domAll == null ? function isNullOrUndefined(x) {\n    return x == null;\n  } : function isNullOrUndefinedAndNotDocumentAll(x) {\n    return x == null && x !== domAll;\n  };\n\n  var ES = {\n    // http://www.ecma-international.org/ecma-262/6.0/#sec-call\n    Call: function Call(F, V) {\n      var args = arguments.length > 2 ? arguments[2] : [];\n      if (!ES.IsCallable(F)) {\n        throw new TypeError(F + ' is not a function');\n      }\n      return _apply(F, V, args);\n    },\n\n    RequireObjectCoercible: function (x, optMessage) {\n      if (isNullOrUndefined(x)) {\n        throw new TypeError(optMessage || 'Cannot call method on ' + x);\n      }\n      return x;\n    },\n\n    // This might miss the \"(non-standard exotic and does not implement\n    // [[Call]])\" case from\n    // http://www.ecma-international.org/ecma-262/6.0/#sec-typeof-operator-runtime-semantics-evaluation\n    // but we can't find any evidence these objects exist in practice.\n    // If we find some in the future, you could test `Object(x) === x`,\n    // which is reliable according to\n    // http://www.ecma-international.org/ecma-262/6.0/#sec-toobject\n    // but is not well optimized by runtimes and creates an object\n    // whenever it returns false, and thus is very slow.\n    TypeIsObject: function (x) {\n      if (x === void 0 || x === null || x === true || x === false) {\n        return false;\n      }\n      return typeof x === 'function' || typeof x === 'object' || x === domAll;\n    },\n\n    ToObject: function (o, optMessage) {\n      return Object(ES.RequireObjectCoercible(o, optMessage));\n    },\n\n    IsCallable: isCallable,\n\n    IsConstructor: function (x) {\n      // We can't tell callables from constructors in ES5\n      return ES.IsCallable(x);\n    },\n\n    ToInt32: function (x) {\n      return ES.ToNumber(x) >> 0;\n    },\n\n    ToUint32: function (x) {\n      return ES.ToNumber(x) >>> 0;\n    },\n\n    ToNumber: function (value) {\n      if (_toString(value) === '[object Symbol]') {\n        throw new TypeError('Cannot convert a Symbol value to a number');\n      }\n      return +value;\n    },\n\n    ToInteger: function (value) {\n      var number = ES.ToNumber(value);\n      if (numberIsNaN(number)) { return 0; }\n      if (number === 0 || !numberIsFinite(number)) { return number; }\n      return (number > 0 ? 1 : -1) * _floor(_abs(number));\n    },\n\n    ToLength: function (value) {\n      var len = ES.ToInteger(value);\n      if (len <= 0) { return 0; } // includes converting -0 to +0\n      if (len > Number.MAX_SAFE_INTEGER) { return Number.MAX_SAFE_INTEGER; }\n      return len;\n    },\n\n    SameValue: function (a, b) {\n      if (a === b) {\n        // 0 === -0, but they are not identical.\n        if (a === 0) { return 1 / a === 1 / b; }\n        return true;\n      }\n      return numberIsNaN(a) && numberIsNaN(b);\n    },\n\n    SameValueZero: function (a, b) {\n      // same as SameValue except for SameValueZero(+0, -0) == true\n      return (a === b) || (numberIsNaN(a) && numberIsNaN(b));\n    },\n\n    IsIterable: function (o) {\n      return ES.TypeIsObject(o) && (typeof o[$iterator$] !== 'undefined' || isArguments(o));\n    },\n\n    GetIterator: function (o) {\n      if (isArguments(o)) {\n        // special case support for `arguments`\n        return new ArrayIterator(o, 'value');\n      }\n      var itFn = ES.GetMethod(o, $iterator$);\n      if (!ES.IsCallable(itFn)) {\n        // Better diagnostics if itFn is null or undefined\n        throw new TypeError('value is not an iterable');\n      }\n      var it = ES.Call(itFn, o);\n      if (!ES.TypeIsObject(it)) {\n        throw new TypeError('bad iterator');\n      }\n      return it;\n    },\n\n    GetMethod: function (o, p) {\n      var func = ES.ToObject(o)[p];\n      if (isNullOrUndefined(func)) {\n        return void 0;\n      }\n      if (!ES.IsCallable(func)) {\n        throw new TypeError('Method not callable: ' + p);\n      }\n      return func;\n    },\n\n    IteratorComplete: function (iterResult) {\n      return !!iterResult.done;\n    },\n\n    IteratorClose: function (iterator, completionIsThrow) {\n      var returnMethod = ES.GetMethod(iterator, 'return');\n      if (returnMethod === void 0) {\n        return;\n      }\n      var innerResult, innerException;\n      try {\n        innerResult = ES.Call(returnMethod, iterator);\n      } catch (e) {\n        innerException = e;\n      }\n      if (completionIsThrow) {\n        return;\n      }\n      if (innerException) {\n        throw innerException;\n      }\n      if (!ES.TypeIsObject(innerResult)) {\n        throw new TypeError(\"Iterator's return method returned a non-object.\");\n      }\n    },\n\n    IteratorNext: function (it) {\n      var result = arguments.length > 1 ? it.next(arguments[1]) : it.next();\n      if (!ES.TypeIsObject(result)) {\n        throw new TypeError('bad iterator');\n      }\n      return result;\n    },\n\n    IteratorStep: function (it) {\n      var result = ES.IteratorNext(it);\n      var done = ES.IteratorComplete(result);\n      return done ? false : result;\n    },\n\n    Construct: function (C, args, newTarget, isES6internal) {\n      var target = typeof newTarget === 'undefined' ? C : newTarget;\n\n      if (!isES6internal && Reflect.construct) {\n        // Try to use Reflect.construct if available\n        return Reflect.construct(C, args, target);\n      }\n      // OK, we have to fake it.  This will only work if the\n      // C.[[ConstructorKind]] == \"base\" -- but that's the only\n      // kind we can make in ES5 code anyway.\n\n      // OrdinaryCreateFromConstructor(target, \"%ObjectPrototype%\")\n      var proto = target.prototype;\n      if (!ES.TypeIsObject(proto)) {\n        proto = Object.prototype;\n      }\n      var obj = create(proto);\n      // Call the constructor.\n      var result = ES.Call(C, obj, args);\n      return ES.TypeIsObject(result) ? result : obj;\n    },\n\n    SpeciesConstructor: function (O, defaultConstructor) {\n      var C = O.constructor;\n      if (C === void 0) {\n        return defaultConstructor;\n      }\n      if (!ES.TypeIsObject(C)) {\n        throw new TypeError('Bad constructor');\n      }\n      var S = C[symbolSpecies];\n      if (isNullOrUndefined(S)) {\n        return defaultConstructor;\n      }\n      if (!ES.IsConstructor(S)) {\n        throw new TypeError('Bad @@species');\n      }\n      return S;\n    },\n\n    CreateHTML: function (string, tag, attribute, value) {\n      var S = ES.ToString(string);\n      var p1 = '<' + tag;\n      if (attribute !== '') {\n        var V = ES.ToString(value);\n        var escapedV = V.replace(/\"/g, '&quot;');\n        p1 += ' ' + attribute + '=\"' + escapedV + '\"';\n      }\n      var p2 = p1 + '>';\n      var p3 = p2 + S;\n      return p3 + '</' + tag + '>';\n    },\n\n    IsRegExp: function IsRegExp(argument) {\n      if (!ES.TypeIsObject(argument)) {\n        return false;\n      }\n      var isRegExp = argument[Symbol.match];\n      if (typeof isRegExp !== 'undefined') {\n        return !!isRegExp;\n      }\n      return Type.regex(argument);\n    },\n\n    ToString: function ToString(string) {\n      return $String(string);\n    }\n  };\n\n  // Well-known Symbol shims\n  if (supportsDescriptors && hasSymbols) {\n    var defineWellKnownSymbol = function defineWellKnownSymbol(name) {\n      if (Type.symbol(Symbol[name])) {\n        return Symbol[name];\n      }\n      // eslint-disable-next-line no-restricted-properties\n      var sym = Symbol['for']('Symbol.' + name);\n      Object.defineProperty(Symbol, name, {\n        configurable: false,\n        enumerable: false,\n        writable: false,\n        value: sym\n      });\n      return sym;\n    };\n    if (!Type.symbol(Symbol.search)) {\n      var symbolSearch = defineWellKnownSymbol('search');\n      var originalSearch = String.prototype.search;\n      defineProperty(RegExp.prototype, symbolSearch, function search(string) {\n        return ES.Call(originalSearch, string, [this]);\n      });\n      var searchShim = function search(regexp) {\n        var O = ES.RequireObjectCoercible(this);\n        if (!isNullOrUndefined(regexp)) {\n          var searcher = ES.GetMethod(regexp, symbolSearch);\n          if (typeof searcher !== 'undefined') {\n            return ES.Call(searcher, regexp, [O]);\n          }\n        }\n        return ES.Call(originalSearch, O, [ES.ToString(regexp)]);\n      };\n      overrideNative(String.prototype, 'search', searchShim);\n    }\n    if (!Type.symbol(Symbol.replace)) {\n      var symbolReplace = defineWellKnownSymbol('replace');\n      var originalReplace = String.prototype.replace;\n      defineProperty(RegExp.prototype, symbolReplace, function replace(string, replaceValue) {\n        return ES.Call(originalReplace, string, [this, replaceValue]);\n      });\n      var replaceShim = function replace(searchValue, replaceValue) {\n        var O = ES.RequireObjectCoercible(this);\n        if (!isNullOrUndefined(searchValue)) {\n          var replacer = ES.GetMethod(searchValue, symbolReplace);\n          if (typeof replacer !== 'undefined') {\n            return ES.Call(replacer, searchValue, [O, replaceValue]);\n          }\n        }\n        return ES.Call(originalReplace, O, [ES.ToString(searchValue), replaceValue]);\n      };\n      overrideNative(String.prototype, 'replace', replaceShim);\n    }\n    if (!Type.symbol(Symbol.split)) {\n      var symbolSplit = defineWellKnownSymbol('split');\n      var originalSplit = String.prototype.split;\n      defineProperty(RegExp.prototype, symbolSplit, function split(string, limit) {\n        return ES.Call(originalSplit, string, [this, limit]);\n      });\n      var splitShim = function split(separator, limit) {\n        var O = ES.RequireObjectCoercible(this);\n        if (!isNullOrUndefined(separator)) {\n          var splitter = ES.GetMethod(separator, symbolSplit);\n          if (typeof splitter !== 'undefined') {\n            return ES.Call(splitter, separator, [O, limit]);\n          }\n        }\n        return ES.Call(originalSplit, O, [ES.ToString(separator), limit]);\n      };\n      overrideNative(String.prototype, 'split', splitShim);\n    }\n    var symbolMatchExists = Type.symbol(Symbol.match);\n    var stringMatchIgnoresSymbolMatch = symbolMatchExists && (function () {\n      // Firefox 41, through Nightly 45 has Symbol.match, but String#match ignores it.\n      // Firefox 40 and below have Symbol.match but String#match works fine.\n      var o = {};\n      o[Symbol.match] = function () { return 42; };\n      return 'a'.match(o) !== 42;\n    }());\n    if (!symbolMatchExists || stringMatchIgnoresSymbolMatch) {\n      var symbolMatch = defineWellKnownSymbol('match');\n\n      var originalMatch = String.prototype.match;\n      defineProperty(RegExp.prototype, symbolMatch, function match(string) {\n        return ES.Call(originalMatch, string, [this]);\n      });\n\n      var matchShim = function match(regexp) {\n        var O = ES.RequireObjectCoercible(this);\n        if (!isNullOrUndefined(regexp)) {\n          var matcher = ES.GetMethod(regexp, symbolMatch);\n          if (typeof matcher !== 'undefined') {\n            return ES.Call(matcher, regexp, [O]);\n          }\n        }\n        return ES.Call(originalMatch, O, [ES.ToString(regexp)]);\n      };\n      overrideNative(String.prototype, 'match', matchShim);\n    }\n  }\n\n  var wrapConstructor = function wrapConstructor(original, replacement, keysToSkip) {\n    Value.preserveToString(replacement, original);\n    if (Object.setPrototypeOf) {\n      // sets up proper prototype chain where possible\n      Object.setPrototypeOf(original, replacement);\n    }\n    if (supportsDescriptors) {\n      _forEach(Object.getOwnPropertyNames(original), function (key) {\n        if (key in noop || keysToSkip[key]) { return; }\n        Value.proxy(original, key, replacement);\n      });\n    } else {\n      _forEach(Object.keys(original), function (key) {\n        if (key in noop || keysToSkip[key]) { return; }\n        replacement[key] = original[key];\n      });\n    }\n    replacement.prototype = original.prototype;\n    Value.redefine(original.prototype, 'constructor', replacement);\n  };\n\n  var defaultSpeciesGetter = function () { return this; };\n  var addDefaultSpecies = function (C) {\n    if (supportsDescriptors && !_hasOwnProperty(C, symbolSpecies)) {\n      Value.getter(C, symbolSpecies, defaultSpeciesGetter);\n    }\n  };\n\n  var addIterator = function (prototype, impl) {\n    var implementation = impl || function iterator() { return this; };\n    defineProperty(prototype, $iterator$, implementation);\n    if (!prototype[$iterator$] && Type.symbol($iterator$)) {\n      // implementations are buggy when $iterator$ is a Symbol\n      prototype[$iterator$] = implementation;\n    }\n  };\n\n  var createDataProperty = function createDataProperty(object, name, value) {\n    if (supportsDescriptors) {\n      Object.defineProperty(object, name, {\n        configurable: true,\n        enumerable: true,\n        writable: true,\n        value: value\n      });\n    } else {\n      object[name] = value;\n    }\n  };\n  var createDataPropertyOrThrow = function createDataPropertyOrThrow(object, name, value) {\n    createDataProperty(object, name, value);\n    if (!ES.SameValue(object[name], value)) {\n      throw new TypeError('property is nonconfigurable');\n    }\n  };\n\n  var emulateES6construct = function (o, defaultNewTarget, defaultProto, slots) {\n    // This is an es5 approximation to es6 construct semantics.  in es6,\n    // 'new Foo' invokes Foo.[[Construct]] which (for almost all objects)\n    // just sets the internal variable NewTarget (in es6 syntax `new.target`)\n    // to Foo and then returns Foo().\n\n    // Many ES6 object then have constructors of the form:\n    // 1. If NewTarget is undefined, throw a TypeError exception\n    // 2. Let xxx by OrdinaryCreateFromConstructor(NewTarget, yyy, zzz)\n\n    // So we're going to emulate those first two steps.\n    if (!ES.TypeIsObject(o)) {\n      throw new TypeError('Constructor requires `new`: ' + defaultNewTarget.name);\n    }\n    var proto = defaultNewTarget.prototype;\n    if (!ES.TypeIsObject(proto)) {\n      proto = defaultProto;\n    }\n    var obj = create(proto);\n    for (var name in slots) {\n      if (_hasOwnProperty(slots, name)) {\n        var value = slots[name];\n        defineProperty(obj, name, value, true);\n      }\n    }\n    return obj;\n  };\n\n  // Firefox 31 reports this function's length as 0\n  // https://bugzilla.mozilla.org/show_bug.cgi?id=1062484\n  if (String.fromCodePoint && String.fromCodePoint.length !== 1) {\n    var originalFromCodePoint = String.fromCodePoint;\n    overrideNative(String, 'fromCodePoint', function fromCodePoint(codePoints) {\n      return ES.Call(originalFromCodePoint, this, arguments);\n    });\n  }\n\n  var StringShims = {\n    fromCodePoint: function fromCodePoint(codePoints) {\n      var result = [];\n      var next;\n      for (var i = 0, length = arguments.length; i < length; i++) {\n        next = Number(arguments[i]);\n        if (!ES.SameValue(next, ES.ToInteger(next)) || next < 0 || next > 0x10FFFF) {\n          throw new RangeError('Invalid code point ' + next);\n        }\n\n        if (next < 0x10000) {\n          _push(result, String.fromCharCode(next));\n        } else {\n          next -= 0x10000;\n          _push(result, String.fromCharCode((next >> 10) + 0xD800));\n          _push(result, String.fromCharCode((next % 0x400) + 0xDC00));\n        }\n      }\n      return result.join('');\n    },\n\n    raw: function raw(callSite) {\n      var cooked = ES.ToObject(callSite, 'bad callSite');\n      var rawString = ES.ToObject(cooked.raw, 'bad raw value');\n      var len = rawString.length;\n      var literalsegments = ES.ToLength(len);\n      if (literalsegments <= 0) {\n        return '';\n      }\n\n      var stringElements = [];\n      var nextIndex = 0;\n      var nextKey, next, nextSeg, nextSub;\n      while (nextIndex < literalsegments) {\n        nextKey = ES.ToString(nextIndex);\n        nextSeg = ES.ToString(rawString[nextKey]);\n        _push(stringElements, nextSeg);\n        if (nextIndex + 1 >= literalsegments) {\n          break;\n        }\n        next = nextIndex + 1 < arguments.length ? arguments[nextIndex + 1] : '';\n        nextSub = ES.ToString(next);\n        _push(stringElements, nextSub);\n        nextIndex += 1;\n      }\n      return stringElements.join('');\n    }\n  };\n  if (String.raw && String.raw({ raw: { 0: 'x', 1: 'y', length: 2 } }) !== 'xy') {\n    // IE 11 TP has a broken String.raw implementation\n    overrideNative(String, 'raw', StringShims.raw);\n  }\n  defineProperties(String, StringShims);\n\n  // Fast repeat, uses the `Exponentiation by squaring` algorithm.\n  // Perf: http://jsperf.com/string-repeat2/2\n  var stringRepeat = function repeat(s, times) {\n    if (times < 1) { return ''; }\n    if (times % 2) { return repeat(s, times - 1) + s; }\n    var half = repeat(s, times / 2);\n    return half + half;\n  };\n  var stringMaxLength = Infinity;\n\n  var StringPrototypeShims = {\n    repeat: function repeat(times) {\n      var thisStr = ES.ToString(ES.RequireObjectCoercible(this));\n      var numTimes = ES.ToInteger(times);\n      if (numTimes < 0 || numTimes >= stringMaxLength) {\n        throw new RangeError('repeat count must be less than infinity and not overflow maximum string size');\n      }\n      return stringRepeat(thisStr, numTimes);\n    },\n\n    startsWith: function startsWith(searchString) {\n      var S = ES.ToString(ES.RequireObjectCoercible(this));\n      if (ES.IsRegExp(searchString)) {\n        throw new TypeError('Cannot call method \"startsWith\" with a regex');\n      }\n      var searchStr = ES.ToString(searchString);\n      var position;\n      if (arguments.length > 1) {\n        position = arguments[1];\n      }\n      var start = _max(ES.ToInteger(position), 0);\n      return _strSlice(S, start, start + searchStr.length) === searchStr;\n    },\n\n    endsWith: function endsWith(searchString) {\n      var S = ES.ToString(ES.RequireObjectCoercible(this));\n      if (ES.IsRegExp(searchString)) {\n        throw new TypeError('Cannot call method \"endsWith\" with a regex');\n      }\n      var searchStr = ES.ToString(searchString);\n      var len = S.length;\n      var endPosition;\n      if (arguments.length > 1) {\n        endPosition = arguments[1];\n      }\n      var pos = typeof endPosition === 'undefined' ? len : ES.ToInteger(endPosition);\n      var end = _min(_max(pos, 0), len);\n      return _strSlice(S, end - searchStr.length, end) === searchStr;\n    },\n\n    includes: function includes(searchString) {\n      if (ES.IsRegExp(searchString)) {\n        throw new TypeError('\"includes\" does not accept a RegExp');\n      }\n      var searchStr = ES.ToString(searchString);\n      var position;\n      if (arguments.length > 1) {\n        position = arguments[1];\n      }\n      // Somehow this trick makes method 100% compat with the spec.\n      return _indexOf(this, searchStr, position) !== -1;\n    },\n\n    codePointAt: function codePointAt(pos) {\n      var thisStr = ES.ToString(ES.RequireObjectCoercible(this));\n      var position = ES.ToInteger(pos);\n      var length = thisStr.length;\n      if (position >= 0 && position < length) {\n        var first = thisStr.charCodeAt(position);\n        var isEnd = position + 1 === length;\n        if (first < 0xD800 || first > 0xDBFF || isEnd) { return first; }\n        var second = thisStr.charCodeAt(position + 1);\n        if (second < 0xDC00 || second > 0xDFFF) { return first; }\n        return ((first - 0xD800) * 1024) + (second - 0xDC00) + 0x10000;\n      }\n    }\n  };\n  if (String.prototype.includes && 'a'.includes('a', Infinity) !== false) {\n    overrideNative(String.prototype, 'includes', StringPrototypeShims.includes);\n  }\n\n  if (String.prototype.startsWith && String.prototype.endsWith) {\n    var startsWithRejectsRegex = throwsError(function () {\n      /* throws if spec-compliant */\n      return '/a/'.startsWith(/a/);\n    });\n    var startsWithHandlesInfinity = valueOrFalseIfThrows(function () {\n      return 'abc'.startsWith('a', Infinity) === false;\n    });\n    if (!startsWithRejectsRegex || !startsWithHandlesInfinity) {\n      // Firefox (< 37?) and IE 11 TP have a noncompliant startsWith implementation\n      overrideNative(String.prototype, 'startsWith', StringPrototypeShims.startsWith);\n      overrideNative(String.prototype, 'endsWith', StringPrototypeShims.endsWith);\n    }\n  }\n  if (hasSymbols) {\n    var startsWithSupportsSymbolMatch = valueOrFalseIfThrows(function () {\n      var re = /a/;\n      re[Symbol.match] = false;\n      return '/a/'.startsWith(re);\n    });\n    if (!startsWithSupportsSymbolMatch) {\n      overrideNative(String.prototype, 'startsWith', StringPrototypeShims.startsWith);\n    }\n    var endsWithSupportsSymbolMatch = valueOrFalseIfThrows(function () {\n      var re = /a/;\n      re[Symbol.match] = false;\n      return '/a/'.endsWith(re);\n    });\n    if (!endsWithSupportsSymbolMatch) {\n      overrideNative(String.prototype, 'endsWith', StringPrototypeShims.endsWith);\n    }\n    var includesSupportsSymbolMatch = valueOrFalseIfThrows(function () {\n      var re = /a/;\n      re[Symbol.match] = false;\n      return '/a/'.includes(re);\n    });\n    if (!includesSupportsSymbolMatch) {\n      overrideNative(String.prototype, 'includes', StringPrototypeShims.includes);\n    }\n  }\n\n  defineProperties(String.prototype, StringPrototypeShims);\n\n  // whitespace from: http://es5.github.io/#x15.5.4.20\n  // implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324\n  var ws = [\n    '\\x09\\x0A\\x0B\\x0C\\x0D\\x20\\xA0\\u1680\\u180E\\u2000\\u2001\\u2002\\u2003',\n    '\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028',\n    '\\u2029\\uFEFF'\n  ].join('');\n  var trimRegexp = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g');\n  var trimShim = function trim() {\n    return ES.ToString(ES.RequireObjectCoercible(this)).replace(trimRegexp, '');\n  };\n  var nonWS = ['\\u0085', '\\u200b', '\\ufffe'].join('');\n  var nonWSregex = new RegExp('[' + nonWS + ']', 'g');\n  var isBadHexRegex = /^[-+]0x[0-9a-f]+$/i;\n  var hasStringTrimBug = nonWS.trim().length !== nonWS.length;\n  defineProperty(String.prototype, 'trim', trimShim, hasStringTrimBug);\n\n  // Given an argument x, it will return an IteratorResult object,\n  // with value set to x and done to false.\n  // Given no arguments, it will return an iterator completion object.\n  var iteratorResult = function (x) {\n    return { value: x, done: arguments.length === 0 };\n  };\n\n  // see http://www.ecma-international.org/ecma-262/6.0/#sec-string.prototype-@@iterator\n  var StringIterator = function (s) {\n    ES.RequireObjectCoercible(s);\n    this._s = ES.ToString(s);\n    this._i = 0;\n  };\n  StringIterator.prototype.next = function () {\n    var s = this._s;\n    var i = this._i;\n    if (typeof s === 'undefined' || i >= s.length) {\n      this._s = void 0;\n      return iteratorResult();\n    }\n    var first = s.charCodeAt(i);\n    var second, len;\n    if (first < 0xD800 || first > 0xDBFF || (i + 1) === s.length) {\n      len = 1;\n    } else {\n      second = s.charCodeAt(i + 1);\n      len = (second < 0xDC00 || second > 0xDFFF) ? 1 : 2;\n    }\n    this._i = i + len;\n    return iteratorResult(s.substr(i, len));\n  };\n  addIterator(StringIterator.prototype);\n  addIterator(String.prototype, function () {\n    return new StringIterator(this);\n  });\n\n  var ArrayShims = {\n    from: function from(items) {\n      var C = this;\n      var mapFn;\n      if (arguments.length > 1) {\n        mapFn = arguments[1];\n      }\n      var mapping, T;\n      if (typeof mapFn === 'undefined') {\n        mapping = false;\n      } else {\n        if (!ES.IsCallable(mapFn)) {\n          throw new TypeError('Array.from: when provided, the second argument must be a function');\n        }\n        if (arguments.length > 2) {\n          T = arguments[2];\n        }\n        mapping = true;\n      }\n\n      // Note that that Arrays will use ArrayIterator:\n      // https://bugs.ecmascript.org/show_bug.cgi?id=2416\n      var usingIterator = typeof (isArguments(items) || ES.GetMethod(items, $iterator$)) !== 'undefined';\n\n      var length, result, i;\n      if (usingIterator) {\n        result = ES.IsConstructor(C) ? Object(new C()) : [];\n        var iterator = ES.GetIterator(items);\n        var next, nextValue;\n\n        i = 0;\n        while (true) {\n          next = ES.IteratorStep(iterator);\n          if (next === false) {\n            break;\n          }\n          nextValue = next.value;\n          try {\n            if (mapping) {\n              nextValue = typeof T === 'undefined' ? mapFn(nextValue, i) : _call(mapFn, T, nextValue, i);\n            }\n            result[i] = nextValue;\n          } catch (e) {\n            ES.IteratorClose(iterator, true);\n            throw e;\n          }\n          i += 1;\n        }\n        length = i;\n      } else {\n        var arrayLike = ES.ToObject(items);\n        length = ES.ToLength(arrayLike.length);\n        result = ES.IsConstructor(C) ? Object(new C(length)) : new Array(length);\n        var value;\n        for (i = 0; i < length; ++i) {\n          value = arrayLike[i];\n          if (mapping) {\n            value = typeof T === 'undefined' ? mapFn(value, i) : _call(mapFn, T, value, i);\n          }\n          createDataPropertyOrThrow(result, i, value);\n        }\n      }\n\n      result.length = length;\n      return result;\n    },\n\n    of: function of() {\n      var len = arguments.length;\n      var C = this;\n      var A = isArray(C) || !ES.IsCallable(C) ? new Array(len) : ES.Construct(C, [len]);\n      for (var k = 0; k < len; ++k) {\n        createDataPropertyOrThrow(A, k, arguments[k]);\n      }\n      A.length = len;\n      return A;\n    }\n  };\n  defineProperties(Array, ArrayShims);\n  addDefaultSpecies(Array);\n\n  // Our ArrayIterator is private; see\n  // https://github.com/paulmillr/es6-shim/issues/252\n  ArrayIterator = function (array, kind) {\n    this.i = 0;\n    this.array = array;\n    this.kind = kind;\n  };\n\n  defineProperties(ArrayIterator.prototype, {\n    next: function () {\n      var i = this.i;\n      var array = this.array;\n      if (!(this instanceof ArrayIterator)) {\n        throw new TypeError('Not an ArrayIterator');\n      }\n      if (typeof array !== 'undefined') {\n        var len = ES.ToLength(array.length);\n        for (; i < len; i++) {\n          var kind = this.kind;\n          var retval;\n          if (kind === 'key') {\n            retval = i;\n          } else if (kind === 'value') {\n            retval = array[i];\n          } else if (kind === 'entry') {\n            retval = [i, array[i]];\n          }\n          this.i = i + 1;\n          return iteratorResult(retval);\n        }\n      }\n      this.array = void 0;\n      return iteratorResult();\n    }\n  });\n  addIterator(ArrayIterator.prototype);\n\n  /*\n  var orderKeys = function orderKeys(a, b) {\n    var aNumeric = String(ES.ToInteger(a)) === a;\n    var bNumeric = String(ES.ToInteger(b)) === b;\n    if (aNumeric && bNumeric) {\n      return b - a;\n    } else if (aNumeric && !bNumeric) {\n      return -1;\n    } else if (!aNumeric && bNumeric) {\n      return 1;\n    } else {\n      return a.localeCompare(b);\n    }\n  };\n\n  var getAllKeys = function getAllKeys(object) {\n    var ownKeys = [];\n    var keys = [];\n\n    for (var key in object) {\n      _push(_hasOwnProperty(object, key) ? ownKeys : keys, key);\n    }\n    _sort(ownKeys, orderKeys);\n    _sort(keys, orderKeys);\n\n    return _concat(ownKeys, keys);\n  };\n  */\n\n  // note: this is positioned here because it depends on ArrayIterator\n  var arrayOfSupportsSubclassing = Array.of === ArrayShims.of || (function () {\n    // Detects a bug in Webkit nightly r181886\n    var Foo = function Foo(len) { this.length = len; };\n    Foo.prototype = [];\n    var fooArr = Array.of.apply(Foo, [1, 2]);\n    return fooArr instanceof Foo && fooArr.length === 2;\n  }());\n  if (!arrayOfSupportsSubclassing) {\n    overrideNative(Array, 'of', ArrayShims.of);\n  }\n\n  var ArrayPrototypeShims = {\n    copyWithin: function copyWithin(target, start) {\n      var o = ES.ToObject(this);\n      var len = ES.ToLength(o.length);\n      var relativeTarget = ES.ToInteger(target);\n      var relativeStart = ES.ToInteger(start);\n      var to = relativeTarget < 0 ? _max(len + relativeTarget, 0) : _min(relativeTarget, len);\n      var from = relativeStart < 0 ? _max(len + relativeStart, 0) : _min(relativeStart, len);\n      var end;\n      if (arguments.length > 2) {\n        end = arguments[2];\n      }\n      var relativeEnd = typeof end === 'undefined' ? len : ES.ToInteger(end);\n      var finalItem = relativeEnd < 0 ? _max(len + relativeEnd, 0) : _min(relativeEnd, len);\n      var count = _min(finalItem - from, len - to);\n      var direction = 1;\n      if (from < to && to < (from + count)) {\n        direction = -1;\n        from += count - 1;\n        to += count - 1;\n      }\n      while (count > 0) {\n        if (from in o) {\n          o[to] = o[from];\n        } else {\n          delete o[to];\n        }\n        from += direction;\n        to += direction;\n        count -= 1;\n      }\n      return o;\n    },\n\n    fill: function fill(value) {\n      var start;\n      if (arguments.length > 1) {\n        start = arguments[1];\n      }\n      var end;\n      if (arguments.length > 2) {\n        end = arguments[2];\n      }\n      var O = ES.ToObject(this);\n      var len = ES.ToLength(O.length);\n      start = ES.ToInteger(typeof start === 'undefined' ? 0 : start);\n      end = ES.ToInteger(typeof end === 'undefined' ? len : end);\n\n      var relativeStart = start < 0 ? _max(len + start, 0) : _min(start, len);\n      var relativeEnd = end < 0 ? len + end : end;\n\n      for (var i = relativeStart; i < len && i < relativeEnd; ++i) {\n        O[i] = value;\n      }\n      return O;\n    },\n\n    find: function find(predicate) {\n      var list = ES.ToObject(this);\n      var length = ES.ToLength(list.length);\n      if (!ES.IsCallable(predicate)) {\n        throw new TypeError('Array#find: predicate must be a function');\n      }\n      var thisArg = arguments.length > 1 ? arguments[1] : null;\n      for (var i = 0, value; i < length; i++) {\n        value = list[i];\n        if (thisArg) {\n          if (_call(predicate, thisArg, value, i, list)) {\n            return value;\n          }\n        } else if (predicate(value, i, list)) {\n          return value;\n        }\n      }\n    },\n\n    findIndex: function findIndex(predicate) {\n      var list = ES.ToObject(this);\n      var length = ES.ToLength(list.length);\n      if (!ES.IsCallable(predicate)) {\n        throw new TypeError('Array#findIndex: predicate must be a function');\n      }\n      var thisArg = arguments.length > 1 ? arguments[1] : null;\n      for (var i = 0; i < length; i++) {\n        if (thisArg) {\n          if (_call(predicate, thisArg, list[i], i, list)) {\n            return i;\n          }\n        } else if (predicate(list[i], i, list)) {\n          return i;\n        }\n      }\n      return -1;\n    },\n\n    keys: function keys() {\n      return new ArrayIterator(this, 'key');\n    },\n\n    values: function values() {\n      return new ArrayIterator(this, 'value');\n    },\n\n    entries: function entries() {\n      return new ArrayIterator(this, 'entry');\n    }\n  };\n  // Safari 7.1 defines Array#keys and Array#entries natively,\n  // but the resulting ArrayIterator objects don't have a \"next\" method.\n  if (Array.prototype.keys && !ES.IsCallable([1].keys().next)) {\n    delete Array.prototype.keys;\n  }\n  if (Array.prototype.entries && !ES.IsCallable([1].entries().next)) {\n    delete Array.prototype.entries;\n  }\n\n  // Chrome 38 defines Array#keys and Array#entries, and Array#@@iterator, but not Array#values\n  if (Array.prototype.keys && Array.prototype.entries && !Array.prototype.values && Array.prototype[$iterator$]) {\n    defineProperties(Array.prototype, {\n      values: Array.prototype[$iterator$]\n    });\n    if (Type.symbol(Symbol.unscopables)) {\n      Array.prototype[Symbol.unscopables].values = true;\n    }\n  }\n  // Chrome 40 defines Array#values with the incorrect name, although Array#{keys,entries} have the correct name\n  if (functionsHaveNames && Array.prototype.values && Array.prototype.values.name !== 'values') {\n    var originalArrayPrototypeValues = Array.prototype.values;\n    overrideNative(Array.prototype, 'values', function values() { return ES.Call(originalArrayPrototypeValues, this, arguments); });\n    defineProperty(Array.prototype, $iterator$, Array.prototype.values, true);\n  }\n  defineProperties(Array.prototype, ArrayPrototypeShims);\n\n  if (1 / [true].indexOf(true, -0) < 0) {\n    // indexOf when given a position arg of -0 should return +0.\n    // https://github.com/tc39/ecma262/pull/316\n    defineProperty(Array.prototype, 'indexOf', function indexOf(searchElement) {\n      var value = _arrayIndexOfApply(this, arguments);\n      if (value === 0 && (1 / value) < 0) {\n        return 0;\n      }\n      return value;\n    }, true);\n  }\n\n  addIterator(Array.prototype, function () { return this.values(); });\n  // Chrome defines keys/values/entries on Array, but doesn't give us\n  // any way to identify its iterator.  So add our own shimmed field.\n  if (Object.getPrototypeOf) {\n    addIterator(Object.getPrototypeOf([].values()));\n  }\n\n  // note: this is positioned here because it relies on Array#entries\n  var arrayFromSwallowsNegativeLengths = (function () {\n    // Detects a Firefox bug in v32\n    // https://bugzilla.mozilla.org/show_bug.cgi?id=1063993\n    return valueOrFalseIfThrows(function () {\n      return Array.from({ length: -1 }).length === 0;\n    });\n  }());\n  var arrayFromHandlesIterables = (function () {\n    // Detects a bug in Webkit nightly r181886\n    var arr = Array.from([0].entries());\n    return arr.length === 1 && isArray(arr[0]) && arr[0][0] === 0 && arr[0][1] === 0;\n  }());\n  if (!arrayFromSwallowsNegativeLengths || !arrayFromHandlesIterables) {\n    overrideNative(Array, 'from', ArrayShims.from);\n  }\n  var arrayFromHandlesUndefinedMapFunction = (function () {\n    // Microsoft Edge v0.11 throws if the mapFn argument is *provided* but undefined,\n    // but the spec doesn't care if it's provided or not - undefined doesn't throw.\n    return valueOrFalseIfThrows(function () {\n      return Array.from([0], void 0);\n    });\n  }());\n  if (!arrayFromHandlesUndefinedMapFunction) {\n    var origArrayFrom = Array.from;\n    overrideNative(Array, 'from', function from(items) {\n      if (arguments.length > 1 && typeof arguments[1] !== 'undefined') {\n        return ES.Call(origArrayFrom, this, arguments);\n      } else {\n        return _call(origArrayFrom, this, items);\n      }\n    });\n  }\n\n  var int32sAsOne = -(Math.pow(2, 32) - 1);\n  var toLengthsCorrectly = function (method, reversed) {\n    var obj = { length: int32sAsOne };\n    obj[reversed ? (obj.length >>> 0) - 1 : 0] = true;\n    return valueOrFalseIfThrows(function () {\n      _call(method, obj, function () {\n        // note: in nonconforming browsers, this will be called\n        // -1 >>> 0 times, which is 4294967295, so the throw matters.\n        throw new RangeError('should not reach here');\n      }, []);\n      return true;\n    });\n  };\n  if (!toLengthsCorrectly(Array.prototype.forEach)) {\n    var originalForEach = Array.prototype.forEach;\n    overrideNative(Array.prototype, 'forEach', function forEach(callbackFn) {\n      return ES.Call(originalForEach, this.length >= 0 ? this : [], arguments);\n    }, true);\n  }\n  if (!toLengthsCorrectly(Array.prototype.map)) {\n    var originalMap = Array.prototype.map;\n    overrideNative(Array.prototype, 'map', function map(callbackFn) {\n      return ES.Call(originalMap, this.length >= 0 ? this : [], arguments);\n    }, true);\n  }\n  if (!toLengthsCorrectly(Array.prototype.filter)) {\n    var originalFilter = Array.prototype.filter;\n    overrideNative(Array.prototype, 'filter', function filter(callbackFn) {\n      return ES.Call(originalFilter, this.length >= 0 ? this : [], arguments);\n    }, true);\n  }\n  if (!toLengthsCorrectly(Array.prototype.some)) {\n    var originalSome = Array.prototype.some;\n    overrideNative(Array.prototype, 'some', function some(callbackFn) {\n      return ES.Call(originalSome, this.length >= 0 ? this : [], arguments);\n    }, true);\n  }\n  if (!toLengthsCorrectly(Array.prototype.every)) {\n    var originalEvery = Array.prototype.every;\n    overrideNative(Array.prototype, 'every', function every(callbackFn) {\n      return ES.Call(originalEvery, this.length >= 0 ? this : [], arguments);\n    }, true);\n  }\n  if (!toLengthsCorrectly(Array.prototype.reduce)) {\n    var originalReduce = Array.prototype.reduce;\n    overrideNative(Array.prototype, 'reduce', function reduce(callbackFn) {\n      return ES.Call(originalReduce, this.length >= 0 ? this : [], arguments);\n    }, true);\n  }\n  if (!toLengthsCorrectly(Array.prototype.reduceRight, true)) {\n    var originalReduceRight = Array.prototype.reduceRight;\n    overrideNative(Array.prototype, 'reduceRight', function reduceRight(callbackFn) {\n      return ES.Call(originalReduceRight, this.length >= 0 ? this : [], arguments);\n    }, true);\n  }\n\n  var lacksOctalSupport = Number('0o10') !== 8;\n  var lacksBinarySupport = Number('0b10') !== 2;\n  var trimsNonWhitespace = _some(nonWS, function (c) {\n    return Number(c + 0 + c) === 0;\n  });\n  if (lacksOctalSupport || lacksBinarySupport || trimsNonWhitespace) {\n    var OrigNumber = Number;\n    var binaryRegex = /^0b[01]+$/i;\n    var octalRegex = /^0o[0-7]+$/i;\n    // Note that in IE 8, RegExp.prototype.test doesn't seem to exist: ie, \"test\" is an own property of regexes. wtf.\n    var isBinary = binaryRegex.test.bind(binaryRegex);\n    var isOctal = octalRegex.test.bind(octalRegex);\n    var toPrimitive = function (O) { // need to replace this with `es-to-primitive/es6`\n      var result;\n      if (typeof O.valueOf === 'function') {\n        result = O.valueOf();\n        if (Type.primitive(result)) {\n          return result;\n        }\n      }\n      if (typeof O.toString === 'function') {\n        result = O.toString();\n        if (Type.primitive(result)) {\n          return result;\n        }\n      }\n      throw new TypeError('No default value');\n    };\n    var hasNonWS = nonWSregex.test.bind(nonWSregex);\n    var isBadHex = isBadHexRegex.test.bind(isBadHexRegex);\n    var NumberShim = (function () {\n      // this is wrapped in an IIFE because of IE 6-8's wacky scoping issues with named function expressions.\n      var NumberShim = function Number(value) {\n        var primValue;\n        if (arguments.length > 0) {\n          primValue = Type.primitive(value) ? value : toPrimitive(value, 'number');\n        } else {\n          primValue = 0;\n        }\n        if (typeof primValue === 'string') {\n          primValue = ES.Call(trimShim, primValue);\n          if (isBinary(primValue)) {\n            primValue = parseInt(_strSlice(primValue, 2), 2);\n          } else if (isOctal(primValue)) {\n            primValue = parseInt(_strSlice(primValue, 2), 8);\n          } else if (hasNonWS(primValue) || isBadHex(primValue)) {\n            primValue = NaN;\n          }\n        }\n        var receiver = this;\n        var valueOfSucceeds = valueOrFalseIfThrows(function () {\n          OrigNumber.prototype.valueOf.call(receiver);\n          return true;\n        });\n        if (receiver instanceof NumberShim && !valueOfSucceeds) {\n          return new OrigNumber(primValue);\n        }\n        return OrigNumber(primValue);\n      };\n      return NumberShim;\n    }());\n    wrapConstructor(OrigNumber, NumberShim, {});\n    // this is necessary for ES3 browsers, where these properties are non-enumerable.\n    defineProperties(NumberShim, {\n      NaN: OrigNumber.NaN,\n      MAX_VALUE: OrigNumber.MAX_VALUE,\n      MIN_VALUE: OrigNumber.MIN_VALUE,\n      NEGATIVE_INFINITY: OrigNumber.NEGATIVE_INFINITY,\n      POSITIVE_INFINITY: OrigNumber.POSITIVE_INFINITY\n    });\n    /* globals Number: true */\n    /* eslint-disable no-undef, no-global-assign */\n    Number = NumberShim;\n    Value.redefine(globals, 'Number', NumberShim);\n    /* eslint-enable no-undef, no-global-assign */\n    /* globals Number: false */\n  }\n\n  var maxSafeInteger = Math.pow(2, 53) - 1;\n  defineProperties(Number, {\n    MAX_SAFE_INTEGER: maxSafeInteger,\n    MIN_SAFE_INTEGER: -maxSafeInteger,\n    EPSILON: 2.220446049250313e-16,\n\n    parseInt: globals.parseInt,\n    parseFloat: globals.parseFloat,\n\n    isFinite: numberIsFinite,\n\n    isInteger: function isInteger(value) {\n      return numberIsFinite(value) && ES.ToInteger(value) === value;\n    },\n\n    isSafeInteger: function isSafeInteger(value) {\n      return Number.isInteger(value) && _abs(value) <= Number.MAX_SAFE_INTEGER;\n    },\n\n    isNaN: numberIsNaN\n  });\n  // Firefox 37 has a conforming Number.parseInt, but it's not === to the global parseInt (fixed in v40)\n  defineProperty(Number, 'parseInt', globals.parseInt, Number.parseInt !== globals.parseInt);\n\n  // Work around bugs in Array#find and Array#findIndex -- early\n  // implementations skipped holes in sparse arrays. (Note that the\n  // implementations of find/findIndex indirectly use shimmed\n  // methods of Number, so this test has to happen down here.)\n  /* eslint-disable no-sparse-arrays */\n  if ([, 1].find(function () { return true; }) === 1) {\n    overrideNative(Array.prototype, 'find', ArrayPrototypeShims.find);\n  }\n  if ([, 1].findIndex(function () { return true; }) !== 0) {\n    overrideNative(Array.prototype, 'findIndex', ArrayPrototypeShims.findIndex);\n  }\n  /* eslint-enable no-sparse-arrays */\n\n  var isEnumerableOn = Function.bind.call(Function.bind, Object.prototype.propertyIsEnumerable);\n  var ensureEnumerable = function ensureEnumerable(obj, prop) {\n    if (supportsDescriptors && isEnumerableOn(obj, prop)) {\n      Object.defineProperty(obj, prop, { enumerable: false });\n    }\n  };\n  var sliceArgs = function sliceArgs() {\n    // per https://github.com/petkaantonov/bluebird/wiki/Optimization-killers#32-leaking-arguments\n    // and https://gist.github.com/WebReflection/4327762cb87a8c634a29\n    var initial = Number(this);\n    var len = arguments.length;\n    var desiredArgCount = len - initial;\n    var args = new Array(desiredArgCount < 0 ? 0 : desiredArgCount);\n    for (var i = initial; i < len; ++i) {\n      args[i - initial] = arguments[i];\n    }\n    return args;\n  };\n  var assignTo = function assignTo(source) {\n    return function assignToSource(target, key) {\n      target[key] = source[key];\n      return target;\n    };\n  };\n  var assignReducer = function (target, source) {\n    var sourceKeys = keys(Object(source));\n    var symbols;\n    if (ES.IsCallable(Object.getOwnPropertySymbols)) {\n      symbols = _filter(Object.getOwnPropertySymbols(Object(source)), isEnumerableOn(source));\n    }\n    return _reduce(_concat(sourceKeys, symbols || []), assignTo(source), target);\n  };\n\n  var ObjectShims = {\n    // 19.1.3.1\n    assign: function (target, source) {\n      var to = ES.ToObject(target, 'Cannot convert undefined or null to object');\n      return _reduce(ES.Call(sliceArgs, 1, arguments), assignReducer, to);\n    },\n\n    // Added in WebKit in https://bugs.webkit.org/show_bug.cgi?id=143865\n    is: function is(a, b) {\n      return ES.SameValue(a, b);\n    }\n  };\n  var assignHasPendingExceptions = Object.assign && Object.preventExtensions && (function () {\n    // Firefox 37 still has \"pending exception\" logic in its Object.assign implementation,\n    // which is 72% slower than our shim, and Firefox 40's native implementation.\n    var thrower = Object.preventExtensions({ 1: 2 });\n    try {\n      Object.assign(thrower, 'xy');\n    } catch (e) {\n      return thrower[1] === 'y';\n    }\n  }());\n  if (assignHasPendingExceptions) {\n    overrideNative(Object, 'assign', ObjectShims.assign);\n  }\n  defineProperties(Object, ObjectShims);\n\n  if (supportsDescriptors) {\n    var ES5ObjectShims = {\n      // 19.1.3.9\n      // shim from https://gist.github.com/WebReflection/5593554\n      setPrototypeOf: (function (Object, magic) {\n        var set;\n\n        var checkArgs = function (O, proto) {\n          if (!ES.TypeIsObject(O)) {\n            throw new TypeError('cannot set prototype on a non-object');\n          }\n          if (!(proto === null || ES.TypeIsObject(proto))) {\n            throw new TypeError('can only set prototype to an object or null' + proto);\n          }\n        };\n\n        var setPrototypeOf = function (O, proto) {\n          checkArgs(O, proto);\n          _call(set, O, proto);\n          return O;\n        };\n\n        try {\n          // this works already in Firefox and Safari\n          set = Object.getOwnPropertyDescriptor(Object.prototype, magic).set;\n          _call(set, {}, null);\n        } catch (e) {\n          if (Object.prototype !== {}[magic]) {\n            // IE < 11 cannot be shimmed\n            return;\n          }\n          // probably Chrome or some old Mobile stock browser\n          set = function (proto) {\n            this[magic] = proto;\n          };\n          // please note that this will **not** work\n          // in those browsers that do not inherit\n          // __proto__ by mistake from Object.prototype\n          // in these cases we should probably throw an error\n          // or at least be informed about the issue\n          setPrototypeOf.polyfill = setPrototypeOf(\n            setPrototypeOf({}, null),\n            Object.prototype\n          ) instanceof Object;\n          // setPrototypeOf.polyfill === true means it works as meant\n          // setPrototypeOf.polyfill === false means it's not 100% reliable\n          // setPrototypeOf.polyfill === undefined\n          // or\n          // setPrototypeOf.polyfill ==  null means it's not a polyfill\n          // which means it works as expected\n          // we can even delete Object.prototype.__proto__;\n        }\n        return setPrototypeOf;\n      }(Object, '__proto__'))\n    };\n\n    defineProperties(Object, ES5ObjectShims);\n  }\n\n  // Workaround bug in Opera 12 where setPrototypeOf(x, null) doesn't work,\n  // but Object.create(null) does.\n  if (Object.setPrototypeOf && Object.getPrototypeOf &&\n      Object.getPrototypeOf(Object.setPrototypeOf({}, null)) !== null &&\n      Object.getPrototypeOf(Object.create(null)) === null) {\n    (function () {\n      var FAKENULL = Object.create(null);\n      var gpo = Object.getPrototypeOf;\n      var spo = Object.setPrototypeOf;\n      Object.getPrototypeOf = function (o) {\n        var result = gpo(o);\n        return result === FAKENULL ? null : result;\n      };\n      Object.setPrototypeOf = function (o, p) {\n        var proto = p === null ? FAKENULL : p;\n        return spo(o, proto);\n      };\n      Object.setPrototypeOf.polyfill = false;\n    }());\n  }\n\n  var objectKeysAcceptsPrimitives = !throwsError(function () { return Object.keys('foo'); });\n  if (!objectKeysAcceptsPrimitives) {\n    var originalObjectKeys = Object.keys;\n    overrideNative(Object, 'keys', function keys(value) {\n      return originalObjectKeys(ES.ToObject(value));\n    });\n    keys = Object.keys;\n  }\n  var objectKeysRejectsRegex = throwsError(function () { return Object.keys(/a/g); });\n  if (objectKeysRejectsRegex) {\n    var regexRejectingObjectKeys = Object.keys;\n    overrideNative(Object, 'keys', function keys(value) {\n      if (Type.regex(value)) {\n        var regexKeys = [];\n        for (var k in value) {\n          if (_hasOwnProperty(value, k)) {\n            _push(regexKeys, k);\n          }\n        }\n        return regexKeys;\n      }\n      return regexRejectingObjectKeys(value);\n    });\n    keys = Object.keys;\n  }\n\n  if (Object.getOwnPropertyNames) {\n    var objectGOPNAcceptsPrimitives = !throwsError(function () { return Object.getOwnPropertyNames('foo'); });\n    if (!objectGOPNAcceptsPrimitives) {\n      var cachedWindowNames = typeof window === 'object' ? Object.getOwnPropertyNames(window) : [];\n      var originalObjectGetOwnPropertyNames = Object.getOwnPropertyNames;\n      overrideNative(Object, 'getOwnPropertyNames', function getOwnPropertyNames(value) {\n        var val = ES.ToObject(value);\n        if (_toString(val) === '[object Window]') {\n          try {\n            return originalObjectGetOwnPropertyNames(val);\n          } catch (e) {\n            // IE bug where layout engine calls userland gOPN for cross-domain `window` objects\n            return _concat([], cachedWindowNames);\n          }\n        }\n        return originalObjectGetOwnPropertyNames(val);\n      });\n    }\n  }\n  if (Object.getOwnPropertyDescriptor) {\n    var objectGOPDAcceptsPrimitives = !throwsError(function () { return Object.getOwnPropertyDescriptor('foo', 'bar'); });\n    if (!objectGOPDAcceptsPrimitives) {\n      var originalObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n      overrideNative(Object, 'getOwnPropertyDescriptor', function getOwnPropertyDescriptor(value, property) {\n        return originalObjectGetOwnPropertyDescriptor(ES.ToObject(value), property);\n      });\n    }\n  }\n  if (Object.seal) {\n    var objectSealAcceptsPrimitives = !throwsError(function () { return Object.seal('foo'); });\n    if (!objectSealAcceptsPrimitives) {\n      var originalObjectSeal = Object.seal;\n      overrideNative(Object, 'seal', function seal(value) {\n        if (!ES.TypeIsObject(value)) { return value; }\n        return originalObjectSeal(value);\n      });\n    }\n  }\n  if (Object.isSealed) {\n    var objectIsSealedAcceptsPrimitives = !throwsError(function () { return Object.isSealed('foo'); });\n    if (!objectIsSealedAcceptsPrimitives) {\n      var originalObjectIsSealed = Object.isSealed;\n      overrideNative(Object, 'isSealed', function isSealed(value) {\n        if (!ES.TypeIsObject(value)) { return true; }\n        return originalObjectIsSealed(value);\n      });\n    }\n  }\n  if (Object.freeze) {\n    var objectFreezeAcceptsPrimitives = !throwsError(function () { return Object.freeze('foo'); });\n    if (!objectFreezeAcceptsPrimitives) {\n      var originalObjectFreeze = Object.freeze;\n      overrideNative(Object, 'freeze', function freeze(value) {\n        if (!ES.TypeIsObject(value)) { return value; }\n        return originalObjectFreeze(value);\n      });\n    }\n  }\n  if (Object.isFrozen) {\n    var objectIsFrozenAcceptsPrimitives = !throwsError(function () { return Object.isFrozen('foo'); });\n    if (!objectIsFrozenAcceptsPrimitives) {\n      var originalObjectIsFrozen = Object.isFrozen;\n      overrideNative(Object, 'isFrozen', function isFrozen(value) {\n        if (!ES.TypeIsObject(value)) { return true; }\n        return originalObjectIsFrozen(value);\n      });\n    }\n  }\n  if (Object.preventExtensions) {\n    var objectPreventExtensionsAcceptsPrimitives = !throwsError(function () { return Object.preventExtensions('foo'); });\n    if (!objectPreventExtensionsAcceptsPrimitives) {\n      var originalObjectPreventExtensions = Object.preventExtensions;\n      overrideNative(Object, 'preventExtensions', function preventExtensions(value) {\n        if (!ES.TypeIsObject(value)) { return value; }\n        return originalObjectPreventExtensions(value);\n      });\n    }\n  }\n  if (Object.isExtensible) {\n    var objectIsExtensibleAcceptsPrimitives = !throwsError(function () { return Object.isExtensible('foo'); });\n    if (!objectIsExtensibleAcceptsPrimitives) {\n      var originalObjectIsExtensible = Object.isExtensible;\n      overrideNative(Object, 'isExtensible', function isExtensible(value) {\n        if (!ES.TypeIsObject(value)) { return false; }\n        return originalObjectIsExtensible(value);\n      });\n    }\n  }\n  if (Object.getPrototypeOf) {\n    var objectGetProtoAcceptsPrimitives = !throwsError(function () { return Object.getPrototypeOf('foo'); });\n    if (!objectGetProtoAcceptsPrimitives) {\n      var originalGetProto = Object.getPrototypeOf;\n      overrideNative(Object, 'getPrototypeOf', function getPrototypeOf(value) {\n        return originalGetProto(ES.ToObject(value));\n      });\n    }\n  }\n\n  var hasFlags = supportsDescriptors && (function () {\n    var desc = Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags');\n    return desc && ES.IsCallable(desc.get);\n  }());\n  if (supportsDescriptors && !hasFlags) {\n    var regExpFlagsGetter = function flags() {\n      if (!ES.TypeIsObject(this)) {\n        throw new TypeError('Method called on incompatible type: must be an object.');\n      }\n      var result = '';\n      if (this.global) {\n        result += 'g';\n      }\n      if (this.ignoreCase) {\n        result += 'i';\n      }\n      if (this.multiline) {\n        result += 'm';\n      }\n      if (this.unicode) {\n        result += 'u';\n      }\n      if (this.sticky) {\n        result += 'y';\n      }\n      return result;\n    };\n\n    Value.getter(RegExp.prototype, 'flags', regExpFlagsGetter);\n  }\n\n  var regExpSupportsFlagsWithRegex = supportsDescriptors && valueOrFalseIfThrows(function () {\n    return String(new RegExp(/a/g, 'i')) === '/a/i';\n  });\n  var regExpNeedsToSupportSymbolMatch = hasSymbols && supportsDescriptors && (function () {\n    // Edge 0.12 supports flags fully, but does not support Symbol.match\n    var regex = /./;\n    regex[Symbol.match] = false;\n    return RegExp(regex) === regex;\n  }());\n\n  var regexToStringIsGeneric = valueOrFalseIfThrows(function () {\n    return RegExp.prototype.toString.call({ source: 'abc' }) === '/abc/';\n  });\n  var regexToStringSupportsGenericFlags = regexToStringIsGeneric && valueOrFalseIfThrows(function () {\n    return RegExp.prototype.toString.call({ source: 'a', flags: 'b' }) === '/a/b';\n  });\n  if (!regexToStringIsGeneric || !regexToStringSupportsGenericFlags) {\n    var origRegExpToString = RegExp.prototype.toString;\n    defineProperty(RegExp.prototype, 'toString', function toString() {\n      var R = ES.RequireObjectCoercible(this);\n      if (Type.regex(R)) {\n        return _call(origRegExpToString, R);\n      }\n      var pattern = $String(R.source);\n      var flags = $String(R.flags);\n      return '/' + pattern + '/' + flags;\n    }, true);\n    Value.preserveToString(RegExp.prototype.toString, origRegExpToString);\n  }\n\n  if (supportsDescriptors && (!regExpSupportsFlagsWithRegex || regExpNeedsToSupportSymbolMatch)) {\n    var flagsGetter = Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags').get;\n    var sourceDesc = Object.getOwnPropertyDescriptor(RegExp.prototype, 'source') || {};\n    var legacySourceGetter = function () {\n      // prior to it being a getter, it's own + nonconfigurable\n      return this.source;\n    };\n    var sourceGetter = ES.IsCallable(sourceDesc.get) ? sourceDesc.get : legacySourceGetter;\n\n    var OrigRegExp = RegExp;\n    var RegExpShim = (function () {\n      return function RegExp(pattern, flags) {\n        var patternIsRegExp = ES.IsRegExp(pattern);\n        var calledWithNew = this instanceof RegExp;\n        if (!calledWithNew && patternIsRegExp && typeof flags === 'undefined' && pattern.constructor === RegExp) {\n          return pattern;\n        }\n\n        var P = pattern;\n        var F = flags;\n        if (Type.regex(pattern)) {\n          P = ES.Call(sourceGetter, pattern);\n          F = typeof flags === 'undefined' ? ES.Call(flagsGetter, pattern) : flags;\n          return new RegExp(P, F);\n        } else if (patternIsRegExp) {\n          P = pattern.source;\n          F = typeof flags === 'undefined' ? pattern.flags : flags;\n        }\n        return new OrigRegExp(pattern, flags);\n      };\n    }());\n    wrapConstructor(OrigRegExp, RegExpShim, {\n      $input: true // Chrome < v39 & Opera < 26 have a nonstandard \"$input\" property\n    });\n    /* globals RegExp: true */\n    /* eslint-disable no-undef, no-global-assign */\n    RegExp = RegExpShim;\n    Value.redefine(globals, 'RegExp', RegExpShim);\n    /* eslint-enable no-undef, no-global-assign */\n    /* globals RegExp: false */\n  }\n\n  if (supportsDescriptors) {\n    var regexGlobals = {\n      input: '$_',\n      lastMatch: '$&',\n      lastParen: '$+',\n      leftContext: '$`',\n      rightContext: '$\\''\n    };\n    _forEach(keys(regexGlobals), function (prop) {\n      if (prop in RegExp && !(regexGlobals[prop] in RegExp)) {\n        Value.getter(RegExp, regexGlobals[prop], function get() {\n          return RegExp[prop];\n        });\n      }\n    });\n  }\n  addDefaultSpecies(RegExp);\n\n  var inverseEpsilon = 1 / Number.EPSILON;\n  var roundTiesToEven = function roundTiesToEven(n) {\n    // Even though this reduces down to `return n`, it takes advantage of built-in rounding.\n    return (n + inverseEpsilon) - inverseEpsilon;\n  };\n  var BINARY_32_EPSILON = Math.pow(2, -23);\n  var BINARY_32_MAX_VALUE = Math.pow(2, 127) * (2 - BINARY_32_EPSILON);\n  var BINARY_32_MIN_VALUE = Math.pow(2, -126);\n  var E = Math.E;\n  var LOG2E = Math.LOG2E;\n  var LOG10E = Math.LOG10E;\n  var numberCLZ = Number.prototype.clz;\n  delete Number.prototype.clz; // Safari 8 has Number#clz\n\n  var MathShims = {\n    acosh: function acosh(value) {\n      var x = Number(value);\n      if (numberIsNaN(x) || value < 1) { return NaN; }\n      if (x === 1) { return 0; }\n      if (x === Infinity) { return x; }\n\n      var xInvSquared = 1 / (x * x);\n      if (x < 2) {\n        return _log1p(x - 1 + (_sqrt(1 - xInvSquared) * x));\n      }\n      var halfX = x / 2;\n      return _log1p(halfX + (_sqrt(1 - xInvSquared) * halfX) - 1) + (1 / LOG2E);\n    },\n\n    asinh: function asinh(value) {\n      var x = Number(value);\n      if (x === 0 || !globalIsFinite(x)) {\n        return x;\n      }\n\n      var a = _abs(x);\n      var aSquared = a * a;\n      var s = _sign(x);\n      if (a < 1) {\n        return s * _log1p(a + (aSquared / (_sqrt(aSquared + 1) + 1)));\n      }\n      return s * (_log1p((a / 2) + (_sqrt(1 + (1 / aSquared)) * a / 2) - 1) + (1 / LOG2E));\n    },\n\n    atanh: function atanh(value) {\n      var x = Number(value);\n\n      if (x === 0) { return x; }\n      if (x === -1) { return -Infinity; }\n      if (x === 1) { return Infinity; }\n      if (numberIsNaN(x) || x < -1 || x > 1) {\n        return NaN;\n      }\n\n      var a = _abs(x);\n      return _sign(x) * _log1p(2 * a / (1 - a)) / 2;\n    },\n\n    cbrt: function cbrt(value) {\n      var x = Number(value);\n      if (x === 0) { return x; }\n      var negate = x < 0;\n      var result;\n      if (negate) { x = -x; }\n      if (x === Infinity) {\n        result = Infinity;\n      } else {\n        result = _exp(_log(x) / 3);\n        // from http://en.wikipedia.org/wiki/Cube_root#Numerical_methods\n        result = ((x / (result * result)) + (2 * result)) / 3;\n      }\n      return negate ? -result : result;\n    },\n\n    clz32: function clz32(value) {\n      // See https://bugs.ecmascript.org/show_bug.cgi?id=2465\n      var x = Number(value);\n      var number = ES.ToUint32(x);\n      if (number === 0) {\n        return 32;\n      }\n      return numberCLZ ? ES.Call(numberCLZ, number) : 31 - _floor(_log(number + 0.5) * LOG2E);\n    },\n\n    cosh: function cosh(value) {\n      var x = Number(value);\n      if (x === 0) { return 1; } // +0 or -0\n      if (numberIsNaN(x)) { return NaN; }\n      if (!globalIsFinite(x)) { return Infinity; }\n\n      var t = _exp(_abs(x) - 1);\n      return (t + (1 / (t * E * E))) * (E / 2);\n    },\n\n    expm1: function expm1(value) {\n      var x = Number(value);\n      if (x === -Infinity) { return -1; }\n      if (!globalIsFinite(x) || x === 0) { return x; }\n      if (_abs(x) > 0.5) {\n        return _exp(x) - 1;\n      }\n      // A more precise approximation using Taylor series expansion\n      // from https://github.com/paulmillr/es6-shim/issues/314#issuecomment-70293986\n      var t = x;\n      var sum = 0;\n      var n = 1;\n      while (sum + t !== sum) {\n        sum += t;\n        n += 1;\n        t *= x / n;\n      }\n      return sum;\n    },\n\n    hypot: function hypot(x, y) {\n      var result = 0;\n      var largest = 0;\n      for (var i = 0; i < arguments.length; ++i) {\n        var value = _abs(Number(arguments[i]));\n        if (largest < value) {\n          result *= (largest / value) * (largest / value);\n          result += 1;\n          largest = value;\n        } else {\n          result += value > 0 ? (value / largest) * (value / largest) : value;\n        }\n      }\n      return largest === Infinity ? Infinity : largest * _sqrt(result);\n    },\n\n    log2: function log2(value) {\n      return _log(value) * LOG2E;\n    },\n\n    log10: function log10(value) {\n      return _log(value) * LOG10E;\n    },\n\n    log1p: _log1p,\n\n    sign: _sign,\n\n    sinh: function sinh(value) {\n      var x = Number(value);\n      if (!globalIsFinite(x) || x === 0) { return x; }\n\n      var a = _abs(x);\n      if (a < 1) {\n        var u = Math.expm1(a);\n        return _sign(x) * u * (1 + (1 / (u + 1))) / 2;\n      }\n      var t = _exp(a - 1);\n      return _sign(x) * (t - (1 / (t * E * E))) * (E / 2);\n    },\n\n    tanh: function tanh(value) {\n      var x = Number(value);\n      if (numberIsNaN(x) || x === 0) { return x; }\n      // can exit early at +-20 as JS loses precision for true value at this integer\n      if (x >= 20) { return 1; }\n      if (x <= -20) { return -1; }\n\n      return (Math.expm1(x) - Math.expm1(-x)) / (_exp(x) + _exp(-x));\n    },\n\n    trunc: function trunc(value) {\n      var x = Number(value);\n      return x < 0 ? -_floor(-x) : _floor(x);\n    },\n\n    imul: function imul(x, y) {\n      // taken from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul\n      var a = ES.ToUint32(x);\n      var b = ES.ToUint32(y);\n      var ah = (a >>> 16) & 0xffff;\n      var al = a & 0xffff;\n      var bh = (b >>> 16) & 0xffff;\n      var bl = b & 0xffff;\n      // the shift by 0 fixes the sign on the high part\n      // the final |0 converts the unsigned value into a signed value\n      return (al * bl) + ((((ah * bl) + (al * bh)) << 16) >>> 0) | 0;\n    },\n\n    fround: function fround(x) {\n      var v = Number(x);\n      if (v === 0 || v === Infinity || v === -Infinity || numberIsNaN(v)) {\n        return v;\n      }\n      var sign = _sign(v);\n      var abs = _abs(v);\n      if (abs < BINARY_32_MIN_VALUE) {\n        return sign * roundTiesToEven(abs / BINARY_32_MIN_VALUE / BINARY_32_EPSILON) * BINARY_32_MIN_VALUE * BINARY_32_EPSILON;\n      }\n      // Veltkamp's splitting (?)\n      var a = (1 + (BINARY_32_EPSILON / Number.EPSILON)) * abs;\n      var result = a - (a - abs);\n      if (result > BINARY_32_MAX_VALUE || numberIsNaN(result)) {\n        return sign * Infinity;\n      }\n      return sign * result;\n    }\n  };\n\n  var withinULPDistance = function withinULPDistance(result, expected, distance) {\n    return _abs(1 - (result / expected)) / Number.EPSILON < (distance || 8);\n  };\n\n  defineProperties(Math, MathShims);\n  // Chrome < 40 sinh returns ∞ for large numbers\n  defineProperty(Math, 'sinh', MathShims.sinh, Math.sinh(710) === Infinity);\n  // Chrome < 40 cosh returns ∞ for large numbers\n  defineProperty(Math, 'cosh', MathShims.cosh, Math.cosh(710) === Infinity);\n  // IE 11 TP has an imprecise log1p: reports Math.log1p(-1e-17) as 0\n  defineProperty(Math, 'log1p', MathShims.log1p, Math.log1p(-1e-17) !== -1e-17);\n  // IE 11 TP has an imprecise asinh: reports Math.asinh(-1e7) as not exactly equal to -Math.asinh(1e7)\n  defineProperty(Math, 'asinh', MathShims.asinh, Math.asinh(-1e7) !== -Math.asinh(1e7));\n  // Chrome < 54 asinh returns ∞ for large numbers and should not\n  defineProperty(Math, 'asinh', MathShims.asinh, Math.asinh(1e+300) === Infinity);\n  // Chrome < 54 atanh incorrectly returns 0 for large numbers\n  defineProperty(Math, 'atanh', MathShims.atanh, Math.atanh(1e-300) === 0);\n  // Chrome 40 has an imprecise Math.tanh with very small numbers\n  defineProperty(Math, 'tanh', MathShims.tanh, Math.tanh(-2e-17) !== -2e-17);\n  // Chrome 40 loses Math.acosh precision with high numbers\n  defineProperty(Math, 'acosh', MathShims.acosh, Math.acosh(Number.MAX_VALUE) === Infinity);\n  // Chrome < 54 has an inaccurate acosh for EPSILON deltas\n  defineProperty(Math, 'acosh', MathShims.acosh, !withinULPDistance(Math.acosh(1 + Number.EPSILON), Math.sqrt(2 * Number.EPSILON)));\n  // Firefox 38 on Windows\n  defineProperty(Math, 'cbrt', MathShims.cbrt, !withinULPDistance(Math.cbrt(1e-300), 1e-100));\n  // node 0.11 has an imprecise Math.sinh with very small numbers\n  defineProperty(Math, 'sinh', MathShims.sinh, Math.sinh(-2e-17) !== -2e-17);\n  // FF 35 on Linux reports 22025.465794806725 for Math.expm1(10)\n  var expm1OfTen = Math.expm1(10);\n  defineProperty(Math, 'expm1', MathShims.expm1, expm1OfTen > 22025.465794806719 || expm1OfTen < 22025.4657948067165168);\n\n  var origMathRound = Math.round;\n  // breaks in e.g. Safari 8, Internet Explorer 11, Opera 12\n  var roundHandlesBoundaryConditions = Math.round(0.5 - (Number.EPSILON / 4)) === 0 &&\n    Math.round(-0.5 + (Number.EPSILON / 3.99)) === 1;\n\n  // When engines use Math.floor(x + 0.5) internally, Math.round can be buggy for large integers.\n  // This behavior should be governed by \"round to nearest, ties to even mode\"\n  // see http://www.ecma-international.org/ecma-262/6.0/#sec-terms-and-definitions-number-type\n  // These are the boundary cases where it breaks.\n  var smallestPositiveNumberWhereRoundBreaks = inverseEpsilon + 1;\n  var largestPositiveNumberWhereRoundBreaks = (2 * inverseEpsilon) - 1;\n  var roundDoesNotIncreaseIntegers = [\n    smallestPositiveNumberWhereRoundBreaks,\n    largestPositiveNumberWhereRoundBreaks\n  ].every(function (num) {\n    return Math.round(num) === num;\n  });\n  defineProperty(Math, 'round', function round(x) {\n    var floor = _floor(x);\n    var ceil = floor === -1 ? -0 : floor + 1;\n    return x - floor < 0.5 ? floor : ceil;\n  }, !roundHandlesBoundaryConditions || !roundDoesNotIncreaseIntegers);\n  Value.preserveToString(Math.round, origMathRound);\n\n  var origImul = Math.imul;\n  if (Math.imul(0xffffffff, 5) !== -5) {\n    // Safari 6.1, at least, reports \"0\" for this value\n    Math.imul = MathShims.imul;\n    Value.preserveToString(Math.imul, origImul);\n  }\n  if (Math.imul.length !== 2) {\n    // Safari 8.0.4 has a length of 1\n    // fixed in https://bugs.webkit.org/show_bug.cgi?id=143658\n    overrideNative(Math, 'imul', function imul(x, y) {\n      return ES.Call(origImul, Math, arguments);\n    });\n  }\n\n  // Promises\n  // Simplest possible implementation; use a 3rd-party library if you\n  // want the best possible speed and/or long stack traces.\n  var PromiseShim = (function () {\n    var setTimeout = globals.setTimeout;\n    // some environments don't have setTimeout - no way to shim here.\n    if (typeof setTimeout !== 'function' && typeof setTimeout !== 'object') { return; }\n\n    ES.IsPromise = function (promise) {\n      if (!ES.TypeIsObject(promise)) {\n        return false;\n      }\n      if (typeof promise._promise === 'undefined') {\n        return false; // uninitialized, or missing our hidden field.\n      }\n      return true;\n    };\n\n    // \"PromiseCapability\" in the spec is what most promise implementations\n    // call a \"deferred\".\n    var PromiseCapability = function (C) {\n      if (!ES.IsConstructor(C)) {\n        throw new TypeError('Bad promise constructor');\n      }\n      var capability = this;\n      var resolver = function (resolve, reject) {\n        if (capability.resolve !== void 0 || capability.reject !== void 0) {\n          throw new TypeError('Bad Promise implementation!');\n        }\n        capability.resolve = resolve;\n        capability.reject = reject;\n      };\n      // Initialize fields to inform optimizers about the object shape.\n      capability.resolve = void 0;\n      capability.reject = void 0;\n      capability.promise = new C(resolver);\n      if (!(ES.IsCallable(capability.resolve) && ES.IsCallable(capability.reject))) {\n        throw new TypeError('Bad promise constructor');\n      }\n    };\n\n    // find an appropriate setImmediate-alike\n    var makeZeroTimeout;\n    /*global window */\n    if (typeof window !== 'undefined' && ES.IsCallable(window.postMessage)) {\n      makeZeroTimeout = function () {\n        // from http://dbaron.org/log/20100309-faster-timeouts\n        var timeouts = [];\n        var messageName = 'zero-timeout-message';\n        var setZeroTimeout = function (fn) {\n          _push(timeouts, fn);\n          window.postMessage(messageName, '*');\n        };\n        var handleMessage = function (event) {\n          if (event.source === window && event.data === messageName) {\n            event.stopPropagation();\n            if (timeouts.length === 0) { return; }\n            var fn = _shift(timeouts);\n            fn();\n          }\n        };\n        window.addEventListener('message', handleMessage, true);\n        return setZeroTimeout;\n      };\n    }\n    var makePromiseAsap = function () {\n      // An efficient task-scheduler based on a pre-existing Promise\n      // implementation, which we can use even if we override the\n      // global Promise below (in order to workaround bugs)\n      // https://github.com/Raynos/observ-hash/issues/2#issuecomment-35857671\n      var P = globals.Promise;\n      var pr = P && P.resolve && P.resolve();\n      return pr && function (task) {\n        return pr.then(task);\n      };\n    };\n    /*global process */\n    var enqueue = ES.IsCallable(globals.setImmediate) ?\n      globals.setImmediate :\n      typeof process === 'object' && process.nextTick ? process.nextTick : makePromiseAsap() ||\n      (ES.IsCallable(makeZeroTimeout) ? makeZeroTimeout() : function (task) { setTimeout(task, 0); }); // fallback\n\n    // Constants for Promise implementation\n    var PROMISE_IDENTITY = function (x) { return x; };\n    var PROMISE_THROWER = function (e) { throw e; };\n    var PROMISE_PENDING = 0;\n    var PROMISE_FULFILLED = 1;\n    var PROMISE_REJECTED = 2;\n    // We store fulfill/reject handlers and capabilities in a single array.\n    var PROMISE_FULFILL_OFFSET = 0;\n    var PROMISE_REJECT_OFFSET = 1;\n    var PROMISE_CAPABILITY_OFFSET = 2;\n    // This is used in an optimization for chaining promises via then.\n    var PROMISE_FAKE_CAPABILITY = {};\n\n    var enqueuePromiseReactionJob = function (handler, capability, argument) {\n      enqueue(function () {\n        promiseReactionJob(handler, capability, argument);\n      });\n    };\n\n    var promiseReactionJob = function (handler, promiseCapability, argument) {\n      var handlerResult, f;\n      if (promiseCapability === PROMISE_FAKE_CAPABILITY) {\n        // Fast case, when we don't actually need to chain through to a\n        // (real) promiseCapability.\n        return handler(argument);\n      }\n      try {\n        handlerResult = handler(argument);\n        f = promiseCapability.resolve;\n      } catch (e) {\n        handlerResult = e;\n        f = promiseCapability.reject;\n      }\n      f(handlerResult);\n    };\n\n    var fulfillPromise = function (promise, value) {\n      var _promise = promise._promise;\n      var length = _promise.reactionLength;\n      if (length > 0) {\n        enqueuePromiseReactionJob(\n          _promise.fulfillReactionHandler0,\n          _promise.reactionCapability0,\n          value\n        );\n        _promise.fulfillReactionHandler0 = void 0;\n        _promise.rejectReactions0 = void 0;\n        _promise.reactionCapability0 = void 0;\n        if (length > 1) {\n          for (var i = 1, idx = 0; i < length; i++, idx += 3) {\n            enqueuePromiseReactionJob(\n              _promise[idx + PROMISE_FULFILL_OFFSET],\n              _promise[idx + PROMISE_CAPABILITY_OFFSET],\n              value\n            );\n            promise[idx + PROMISE_FULFILL_OFFSET] = void 0;\n            promise[idx + PROMISE_REJECT_OFFSET] = void 0;\n            promise[idx + PROMISE_CAPABILITY_OFFSET] = void 0;\n          }\n        }\n      }\n      _promise.result = value;\n      _promise.state = PROMISE_FULFILLED;\n      _promise.reactionLength = 0;\n    };\n\n    var rejectPromise = function (promise, reason) {\n      var _promise = promise._promise;\n      var length = _promise.reactionLength;\n      if (length > 0) {\n        enqueuePromiseReactionJob(\n          _promise.rejectReactionHandler0,\n          _promise.reactionCapability0,\n          reason\n        );\n        _promise.fulfillReactionHandler0 = void 0;\n        _promise.rejectReactions0 = void 0;\n        _promise.reactionCapability0 = void 0;\n        if (length > 1) {\n          for (var i = 1, idx = 0; i < length; i++, idx += 3) {\n            enqueuePromiseReactionJob(\n              _promise[idx + PROMISE_REJECT_OFFSET],\n              _promise[idx + PROMISE_CAPABILITY_OFFSET],\n              reason\n            );\n            promise[idx + PROMISE_FULFILL_OFFSET] = void 0;\n            promise[idx + PROMISE_REJECT_OFFSET] = void 0;\n            promise[idx + PROMISE_CAPABILITY_OFFSET] = void 0;\n          }\n        }\n      }\n      _promise.result = reason;\n      _promise.state = PROMISE_REJECTED;\n      _promise.reactionLength = 0;\n    };\n\n    var createResolvingFunctions = function (promise) {\n      var alreadyResolved = false;\n      var resolve = function (resolution) {\n        var then;\n        if (alreadyResolved) { return; }\n        alreadyResolved = true;\n        if (resolution === promise) {\n          return rejectPromise(promise, new TypeError('Self resolution'));\n        }\n        if (!ES.TypeIsObject(resolution)) {\n          return fulfillPromise(promise, resolution);\n        }\n        try {\n          then = resolution.then;\n        } catch (e) {\n          return rejectPromise(promise, e);\n        }\n        if (!ES.IsCallable(then)) {\n          return fulfillPromise(promise, resolution);\n        }\n        enqueue(function () {\n          promiseResolveThenableJob(promise, resolution, then);\n        });\n      };\n      var reject = function (reason) {\n        if (alreadyResolved) { return; }\n        alreadyResolved = true;\n        return rejectPromise(promise, reason);\n      };\n      return { resolve: resolve, reject: reject };\n    };\n\n    var optimizedThen = function (then, thenable, resolve, reject) {\n      // Optimization: since we discard the result, we can pass our\n      // own then implementation a special hint to let it know it\n      // doesn't have to create it.  (The PROMISE_FAKE_CAPABILITY\n      // object is local to this implementation and unforgeable outside.)\n      if (then === Promise$prototype$then) {\n        _call(then, thenable, resolve, reject, PROMISE_FAKE_CAPABILITY);\n      } else {\n        _call(then, thenable, resolve, reject);\n      }\n    };\n    var promiseResolveThenableJob = function (promise, thenable, then) {\n      var resolvingFunctions = createResolvingFunctions(promise);\n      var resolve = resolvingFunctions.resolve;\n      var reject = resolvingFunctions.reject;\n      try {\n        optimizedThen(then, thenable, resolve, reject);\n      } catch (e) {\n        reject(e);\n      }\n    };\n\n    var Promise$prototype, Promise$prototype$then;\n    var Promise = (function () {\n      var PromiseShim = function Promise(resolver) {\n        if (!(this instanceof PromiseShim)) {\n          throw new TypeError('Constructor Promise requires \"new\"');\n        }\n        if (this && this._promise) {\n          throw new TypeError('Bad construction');\n        }\n        // see https://bugs.ecmascript.org/show_bug.cgi?id=2482\n        if (!ES.IsCallable(resolver)) {\n          throw new TypeError('not a valid resolver');\n        }\n        var promise = emulateES6construct(this, PromiseShim, Promise$prototype, {\n          _promise: {\n            result: void 0,\n            state: PROMISE_PENDING,\n            // The first member of the \"reactions\" array is inlined here,\n            // since most promises only have one reaction.\n            // We've also exploded the 'reaction' object to inline the\n            // \"handler\" and \"capability\" fields, since both fulfill and\n            // reject reactions share the same capability.\n            reactionLength: 0,\n            fulfillReactionHandler0: void 0,\n            rejectReactionHandler0: void 0,\n            reactionCapability0: void 0\n          }\n        });\n        var resolvingFunctions = createResolvingFunctions(promise);\n        var reject = resolvingFunctions.reject;\n        try {\n          resolver(resolvingFunctions.resolve, reject);\n        } catch (e) {\n          reject(e);\n        }\n        return promise;\n      };\n      return PromiseShim;\n    }());\n    Promise$prototype = Promise.prototype;\n\n    var _promiseAllResolver = function (index, values, capability, remaining) {\n      var alreadyCalled = false;\n      return function (x) {\n        if (alreadyCalled) { return; }\n        alreadyCalled = true;\n        values[index] = x;\n        if ((--remaining.count) === 0) {\n          var resolve = capability.resolve;\n          resolve(values); // call w/ this===undefined\n        }\n      };\n    };\n\n    var performPromiseAll = function (iteratorRecord, C, resultCapability) {\n      var it = iteratorRecord.iterator;\n      var values = [];\n      var remaining = { count: 1 };\n      var next, nextValue;\n      var index = 0;\n      while (true) {\n        try {\n          next = ES.IteratorStep(it);\n          if (next === false) {\n            iteratorRecord.done = true;\n            break;\n          }\n          nextValue = next.value;\n        } catch (e) {\n          iteratorRecord.done = true;\n          throw e;\n        }\n        values[index] = void 0;\n        var nextPromise = C.resolve(nextValue);\n        var resolveElement = _promiseAllResolver(\n          index,\n          values,\n          resultCapability,\n          remaining\n        );\n        remaining.count += 1;\n        optimizedThen(nextPromise.then, nextPromise, resolveElement, resultCapability.reject);\n        index += 1;\n      }\n      if ((--remaining.count) === 0) {\n        var resolve = resultCapability.resolve;\n        resolve(values); // call w/ this===undefined\n      }\n      return resultCapability.promise;\n    };\n\n    var performPromiseRace = function (iteratorRecord, C, resultCapability) {\n      var it = iteratorRecord.iterator;\n      var next, nextValue, nextPromise;\n      while (true) {\n        try {\n          next = ES.IteratorStep(it);\n          if (next === false) {\n            // NOTE: If iterable has no items, resulting promise will never\n            // resolve; see:\n            // https://github.com/domenic/promises-unwrapping/issues/75\n            // https://bugs.ecmascript.org/show_bug.cgi?id=2515\n            iteratorRecord.done = true;\n            break;\n          }\n          nextValue = next.value;\n        } catch (e) {\n          iteratorRecord.done = true;\n          throw e;\n        }\n        nextPromise = C.resolve(nextValue);\n        optimizedThen(nextPromise.then, nextPromise, resultCapability.resolve, resultCapability.reject);\n      }\n      return resultCapability.promise;\n    };\n\n    defineProperties(Promise, {\n      all: function all(iterable) {\n        var C = this;\n        if (!ES.TypeIsObject(C)) {\n          throw new TypeError('Promise is not object');\n        }\n        var capability = new PromiseCapability(C);\n        var iterator, iteratorRecord;\n        try {\n          iterator = ES.GetIterator(iterable);\n          iteratorRecord = { iterator: iterator, done: false };\n          return performPromiseAll(iteratorRecord, C, capability);\n        } catch (e) {\n          var exception = e;\n          if (iteratorRecord && !iteratorRecord.done) {\n            try {\n              ES.IteratorClose(iterator, true);\n            } catch (ee) {\n              exception = ee;\n            }\n          }\n          var reject = capability.reject;\n          reject(exception);\n          return capability.promise;\n        }\n      },\n\n      race: function race(iterable) {\n        var C = this;\n        if (!ES.TypeIsObject(C)) {\n          throw new TypeError('Promise is not object');\n        }\n        var capability = new PromiseCapability(C);\n        var iterator, iteratorRecord;\n        try {\n          iterator = ES.GetIterator(iterable);\n          iteratorRecord = { iterator: iterator, done: false };\n          return performPromiseRace(iteratorRecord, C, capability);\n        } catch (e) {\n          var exception = e;\n          if (iteratorRecord && !iteratorRecord.done) {\n            try {\n              ES.IteratorClose(iterator, true);\n            } catch (ee) {\n              exception = ee;\n            }\n          }\n          var reject = capability.reject;\n          reject(exception);\n          return capability.promise;\n        }\n      },\n\n      reject: function reject(reason) {\n        var C = this;\n        if (!ES.TypeIsObject(C)) {\n          throw new TypeError('Bad promise constructor');\n        }\n        var capability = new PromiseCapability(C);\n        var rejectFunc = capability.reject;\n        rejectFunc(reason); // call with this===undefined\n        return capability.promise;\n      },\n\n      resolve: function resolve(v) {\n        // See https://esdiscuss.org/topic/fixing-promise-resolve for spec\n        var C = this;\n        if (!ES.TypeIsObject(C)) {\n          throw new TypeError('Bad promise constructor');\n        }\n        if (ES.IsPromise(v)) {\n          var constructor = v.constructor;\n          if (constructor === C) {\n            return v;\n          }\n        }\n        var capability = new PromiseCapability(C);\n        var resolveFunc = capability.resolve;\n        resolveFunc(v); // call with this===undefined\n        return capability.promise;\n      }\n    });\n\n    defineProperties(Promise$prototype, {\n      'catch': function (onRejected) {\n        return this.then(null, onRejected);\n      },\n\n      then: function then(onFulfilled, onRejected) {\n        var promise = this;\n        if (!ES.IsPromise(promise)) { throw new TypeError('not a promise'); }\n        var C = ES.SpeciesConstructor(promise, Promise);\n        var resultCapability;\n        var returnValueIsIgnored = arguments.length > 2 && arguments[2] === PROMISE_FAKE_CAPABILITY;\n        if (returnValueIsIgnored && C === Promise) {\n          resultCapability = PROMISE_FAKE_CAPABILITY;\n        } else {\n          resultCapability = new PromiseCapability(C);\n        }\n        // PerformPromiseThen(promise, onFulfilled, onRejected, resultCapability)\n        // Note that we've split the 'reaction' object into its two\n        // components, \"capabilities\" and \"handler\"\n        // \"capabilities\" is always equal to `resultCapability`\n        var fulfillReactionHandler = ES.IsCallable(onFulfilled) ? onFulfilled : PROMISE_IDENTITY;\n        var rejectReactionHandler = ES.IsCallable(onRejected) ? onRejected : PROMISE_THROWER;\n        var _promise = promise._promise;\n        var value;\n        if (_promise.state === PROMISE_PENDING) {\n          if (_promise.reactionLength === 0) {\n            _promise.fulfillReactionHandler0 = fulfillReactionHandler;\n            _promise.rejectReactionHandler0 = rejectReactionHandler;\n            _promise.reactionCapability0 = resultCapability;\n          } else {\n            var idx = 3 * (_promise.reactionLength - 1);\n            _promise[idx + PROMISE_FULFILL_OFFSET] = fulfillReactionHandler;\n            _promise[idx + PROMISE_REJECT_OFFSET] = rejectReactionHandler;\n            _promise[idx + PROMISE_CAPABILITY_OFFSET] = resultCapability;\n          }\n          _promise.reactionLength += 1;\n        } else if (_promise.state === PROMISE_FULFILLED) {\n          value = _promise.result;\n          enqueuePromiseReactionJob(\n            fulfillReactionHandler,\n            resultCapability,\n            value\n          );\n        } else if (_promise.state === PROMISE_REJECTED) {\n          value = _promise.result;\n          enqueuePromiseReactionJob(\n            rejectReactionHandler,\n            resultCapability,\n            value\n          );\n        } else {\n          throw new TypeError('unexpected Promise state');\n        }\n        return resultCapability.promise;\n      }\n    });\n    // This helps the optimizer by ensuring that methods which take\n    // capabilities aren't polymorphic.\n    PROMISE_FAKE_CAPABILITY = new PromiseCapability(Promise);\n    Promise$prototype$then = Promise$prototype.then;\n\n    return Promise;\n  }());\n\n  // Chrome's native Promise has extra methods that it shouldn't have. Let's remove them.\n  if (globals.Promise) {\n    delete globals.Promise.accept;\n    delete globals.Promise.defer;\n    delete globals.Promise.prototype.chain;\n  }\n\n  if (typeof PromiseShim === 'function') {\n    // export the Promise constructor.\n    defineProperties(globals, { Promise: PromiseShim });\n    // In Chrome 33 (and thereabouts) Promise is defined, but the\n    // implementation is buggy in a number of ways.  Let's check subclassing\n    // support to see if we have a buggy implementation.\n    var promiseSupportsSubclassing = supportsSubclassing(globals.Promise, function (S) {\n      return S.resolve(42).then(function () {}) instanceof S;\n    });\n    var promiseIgnoresNonFunctionThenCallbacks = !throwsError(function () {\n      return globals.Promise.reject(42).then(null, 5).then(null, noop);\n    });\n    var promiseRequiresObjectContext = throwsError(function () { return globals.Promise.call(3, noop); });\n    // Promise.resolve() was errata'ed late in the ES6 process.\n    // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1170742\n    //      https://code.google.com/p/v8/issues/detail?id=4161\n    // It serves as a proxy for a number of other bugs in early Promise\n    // implementations.\n    var promiseResolveBroken = (function (Promise) {\n      var p = Promise.resolve(5);\n      p.constructor = {};\n      var p2 = Promise.resolve(p);\n      try {\n        p2.then(null, noop).then(null, noop); // avoid \"uncaught rejection\" warnings in console\n      } catch (e) {\n        return true; // v8 native Promises break here https://code.google.com/p/chromium/issues/detail?id=575314\n      }\n      return p === p2; // This *should* be false!\n    }(globals.Promise));\n\n    // Chrome 46 (probably older too) does not retrieve a thenable's .then synchronously\n    var getsThenSynchronously = supportsDescriptors && (function () {\n      var count = 0;\n      // eslint-disable-next-line getter-return\n      var thenable = Object.defineProperty({}, 'then', { get: function () { count += 1; } });\n      Promise.resolve(thenable);\n      return count === 1;\n    }());\n\n    var BadResolverPromise = function BadResolverPromise(executor) {\n      var p = new Promise(executor);\n      executor(3, function () {});\n      this.then = p.then;\n      this.constructor = BadResolverPromise;\n    };\n    BadResolverPromise.prototype = Promise.prototype;\n    BadResolverPromise.all = Promise.all;\n    // Chrome Canary 49 (probably older too) has some implementation bugs\n    var hasBadResolverPromise = valueOrFalseIfThrows(function () {\n      return !!BadResolverPromise.all([1, 2]);\n    });\n\n    if (!promiseSupportsSubclassing || !promiseIgnoresNonFunctionThenCallbacks ||\n        !promiseRequiresObjectContext || promiseResolveBroken ||\n        !getsThenSynchronously || hasBadResolverPromise) {\n      /* globals Promise: true */\n      /* eslint-disable no-undef, no-global-assign */\n      Promise = PromiseShim;\n      /* eslint-enable no-undef, no-global-assign */\n      /* globals Promise: false */\n      overrideNative(globals, 'Promise', PromiseShim);\n    }\n    if (Promise.all.length !== 1) {\n      var origAll = Promise.all;\n      overrideNative(Promise, 'all', function all(iterable) {\n        return ES.Call(origAll, this, arguments);\n      });\n    }\n    if (Promise.race.length !== 1) {\n      var origRace = Promise.race;\n      overrideNative(Promise, 'race', function race(iterable) {\n        return ES.Call(origRace, this, arguments);\n      });\n    }\n    if (Promise.resolve.length !== 1) {\n      var origResolve = Promise.resolve;\n      overrideNative(Promise, 'resolve', function resolve(x) {\n        return ES.Call(origResolve, this, arguments);\n      });\n    }\n    if (Promise.reject.length !== 1) {\n      var origReject = Promise.reject;\n      overrideNative(Promise, 'reject', function reject(r) {\n        return ES.Call(origReject, this, arguments);\n      });\n    }\n    ensureEnumerable(Promise, 'all');\n    ensureEnumerable(Promise, 'race');\n    ensureEnumerable(Promise, 'resolve');\n    ensureEnumerable(Promise, 'reject');\n    addDefaultSpecies(Promise);\n  }\n\n  // Map and Set require a true ES5 environment\n  // Their fast path also requires that the environment preserve\n  // property insertion order, which is not guaranteed by the spec.\n  var testOrder = function (a) {\n    var b = keys(_reduce(a, function (o, k) {\n      o[k] = true;\n      return o;\n    }, {}));\n    return a.join(':') === b.join(':');\n  };\n  var preservesInsertionOrder = testOrder(['z', 'a', 'bb']);\n  // some engines (eg, Chrome) only preserve insertion order for string keys\n  var preservesNumericInsertionOrder = testOrder(['z', 1, 'a', '3', 2]);\n\n  if (supportsDescriptors) {\n\n    var fastkey = function fastkey(key, skipInsertionOrderCheck) {\n      if (!skipInsertionOrderCheck && !preservesInsertionOrder) {\n        return null;\n      }\n      if (isNullOrUndefined(key)) {\n        return '^' + ES.ToString(key);\n      } else if (typeof key === 'string') {\n        return '$' + key;\n      } else if (typeof key === 'number') {\n        // note that -0 will get coerced to \"0\" when used as a property key\n        if (!preservesNumericInsertionOrder) {\n          return 'n' + key;\n        }\n        return key;\n      } else if (typeof key === 'boolean') {\n        return 'b' + key;\n      }\n      return null;\n    };\n\n    var emptyObject = function emptyObject() {\n      // accomodate some older not-quite-ES5 browsers\n      return Object.create ? Object.create(null) : {};\n    };\n\n    var addIterableToMap = function addIterableToMap(MapConstructor, map, iterable) {\n      if (isArray(iterable) || Type.string(iterable)) {\n        _forEach(iterable, function (entry) {\n          if (!ES.TypeIsObject(entry)) {\n            throw new TypeError('Iterator value ' + entry + ' is not an entry object');\n          }\n          map.set(entry[0], entry[1]);\n        });\n      } else if (iterable instanceof MapConstructor) {\n        _call(MapConstructor.prototype.forEach, iterable, function (value, key) {\n          map.set(key, value);\n        });\n      } else {\n        var iter, adder;\n        if (!isNullOrUndefined(iterable)) {\n          adder = map.set;\n          if (!ES.IsCallable(adder)) { throw new TypeError('bad map'); }\n          iter = ES.GetIterator(iterable);\n        }\n        if (typeof iter !== 'undefined') {\n          while (true) {\n            var next = ES.IteratorStep(iter);\n            if (next === false) { break; }\n            var nextItem = next.value;\n            try {\n              if (!ES.TypeIsObject(nextItem)) {\n                throw new TypeError('Iterator value ' + nextItem + ' is not an entry object');\n              }\n              _call(adder, map, nextItem[0], nextItem[1]);\n            } catch (e) {\n              ES.IteratorClose(iter, true);\n              throw e;\n            }\n          }\n        }\n      }\n    };\n    var addIterableToSet = function addIterableToSet(SetConstructor, set, iterable) {\n      if (isArray(iterable) || Type.string(iterable)) {\n        _forEach(iterable, function (value) {\n          set.add(value);\n        });\n      } else if (iterable instanceof SetConstructor) {\n        _call(SetConstructor.prototype.forEach, iterable, function (value) {\n          set.add(value);\n        });\n      } else {\n        var iter, adder;\n        if (!isNullOrUndefined(iterable)) {\n          adder = set.add;\n          if (!ES.IsCallable(adder)) { throw new TypeError('bad set'); }\n          iter = ES.GetIterator(iterable);\n        }\n        if (typeof iter !== 'undefined') {\n          while (true) {\n            var next = ES.IteratorStep(iter);\n            if (next === false) { break; }\n            var nextValue = next.value;\n            try {\n              _call(adder, set, nextValue);\n            } catch (e) {\n              ES.IteratorClose(iter, true);\n              throw e;\n            }\n          }\n        }\n      }\n    };\n\n    var collectionShims = {\n      Map: (function () {\n\n        var empty = {};\n\n        var MapEntry = function MapEntry(key, value) {\n          this.key = key;\n          this.value = value;\n          this.next = null;\n          this.prev = null;\n        };\n\n        MapEntry.prototype.isRemoved = function isRemoved() {\n          return this.key === empty;\n        };\n\n        var isMap = function isMap(map) {\n          return !!map._es6map;\n        };\n\n        var requireMapSlot = function requireMapSlot(map, method) {\n          if (!ES.TypeIsObject(map) || !isMap(map)) {\n            throw new TypeError('Method Map.prototype.' + method + ' called on incompatible receiver ' + ES.ToString(map));\n          }\n        };\n\n        var MapIterator = function MapIterator(map, kind) {\n          requireMapSlot(map, '[[MapIterator]]');\n          this.head = map._head;\n          this.i = this.head;\n          this.kind = kind;\n        };\n\n        MapIterator.prototype = {\n          isMapIterator: true,\n          next: function next() {\n            if (!this.isMapIterator) {\n              throw new TypeError('Not a MapIterator');\n            }\n            var i = this.i;\n            var kind = this.kind;\n            var head = this.head;\n            if (typeof this.i === 'undefined') {\n              return iteratorResult();\n            }\n            while (i.isRemoved() && i !== head) {\n              // back up off of removed entries\n              i = i.prev;\n            }\n            // advance to next unreturned element.\n            var result;\n            while (i.next !== head) {\n              i = i.next;\n              if (!i.isRemoved()) {\n                if (kind === 'key') {\n                  result = i.key;\n                } else if (kind === 'value') {\n                  result = i.value;\n                } else {\n                  result = [i.key, i.value];\n                }\n                this.i = i;\n                return iteratorResult(result);\n              }\n            }\n            // once the iterator is done, it is done forever.\n            this.i = void 0;\n            return iteratorResult();\n          }\n        };\n        addIterator(MapIterator.prototype);\n\n        var Map$prototype;\n        var MapShim = function Map() {\n          if (!(this instanceof Map)) {\n            throw new TypeError('Constructor Map requires \"new\"');\n          }\n          if (this && this._es6map) {\n            throw new TypeError('Bad construction');\n          }\n          var map = emulateES6construct(this, Map, Map$prototype, {\n            _es6map: true,\n            _head: null,\n            _map: OrigMap ? new OrigMap() : null,\n            _size: 0,\n            _storage: emptyObject()\n          });\n\n          var head = new MapEntry(null, null);\n          // circular doubly-linked list.\n          /* eslint no-multi-assign: 1 */\n          head.next = head.prev = head;\n          map._head = head;\n\n          // Optionally initialize map from iterable\n          if (arguments.length > 0) {\n            addIterableToMap(Map, map, arguments[0]);\n          }\n          return map;\n        };\n        Map$prototype = MapShim.prototype;\n\n        Value.getter(Map$prototype, 'size', function () {\n          if (typeof this._size === 'undefined') {\n            throw new TypeError('size method called on incompatible Map');\n          }\n          return this._size;\n        });\n\n        defineProperties(Map$prototype, {\n          get: function get(key) {\n            requireMapSlot(this, 'get');\n            var entry;\n            var fkey = fastkey(key, true);\n            if (fkey !== null) {\n              // fast O(1) path\n              entry = this._storage[fkey];\n              if (entry) {\n                return entry.value;\n              } else {\n                return;\n              }\n            }\n            if (this._map) {\n              // fast object key path\n              entry = origMapGet.call(this._map, key);\n              if (entry) {\n                return entry.value;\n              } else {\n                return;\n              }\n            }\n            var head = this._head;\n            var i = head;\n            while ((i = i.next) !== head) {\n              if (ES.SameValueZero(i.key, key)) {\n                return i.value;\n              }\n            }\n          },\n\n          has: function has(key) {\n            requireMapSlot(this, 'has');\n            var fkey = fastkey(key, true);\n            if (fkey !== null) {\n              // fast O(1) path\n              return typeof this._storage[fkey] !== 'undefined';\n            }\n            if (this._map) {\n              // fast object key path\n              return origMapHas.call(this._map, key);\n            }\n            var head = this._head;\n            var i = head;\n            while ((i = i.next) !== head) {\n              if (ES.SameValueZero(i.key, key)) {\n                return true;\n              }\n            }\n            return false;\n          },\n\n          set: function set(key, value) {\n            requireMapSlot(this, 'set');\n            var head = this._head;\n            var i = head;\n            var entry;\n            var fkey = fastkey(key, true);\n            if (fkey !== null) {\n              // fast O(1) path\n              if (typeof this._storage[fkey] !== 'undefined') {\n                this._storage[fkey].value = value;\n                return this;\n              } else {\n                entry = this._storage[fkey] = new MapEntry(key, value); /* eslint no-multi-assign: 1 */\n                i = head.prev;\n                // fall through\n              }\n            } else if (this._map) {\n              // fast object key path\n              if (origMapHas.call(this._map, key)) {\n                origMapGet.call(this._map, key).value = value;\n              } else {\n                entry = new MapEntry(key, value);\n                origMapSet.call(this._map, key, entry);\n                i = head.prev;\n                // fall through\n              }\n            }\n            while ((i = i.next) !== head) {\n              if (ES.SameValueZero(i.key, key)) {\n                i.value = value;\n                return this;\n              }\n            }\n            entry = entry || new MapEntry(key, value);\n            if (ES.SameValue(-0, key)) {\n              entry.key = +0; // coerce -0 to +0 in entry\n            }\n            entry.next = this._head;\n            entry.prev = this._head.prev;\n            entry.prev.next = entry;\n            entry.next.prev = entry;\n            this._size += 1;\n            return this;\n          },\n\n          'delete': function (key) {\n            requireMapSlot(this, 'delete');\n            var head = this._head;\n            var i = head;\n            var fkey = fastkey(key, true);\n            if (fkey !== null) {\n              // fast O(1) path\n              if (typeof this._storage[fkey] === 'undefined') {\n                return false;\n              }\n              i = this._storage[fkey].prev;\n              delete this._storage[fkey];\n              // fall through\n            } else if (this._map) {\n              // fast object key path\n              if (!origMapHas.call(this._map, key)) {\n                return false;\n              }\n              i = origMapGet.call(this._map, key).prev;\n              origMapDelete.call(this._map, key);\n              // fall through\n            }\n            while ((i = i.next) !== head) {\n              if (ES.SameValueZero(i.key, key)) {\n                i.key = empty;\n                i.value = empty;\n                i.prev.next = i.next;\n                i.next.prev = i.prev;\n                this._size -= 1;\n                return true;\n              }\n            }\n            return false;\n          },\n\n          clear: function clear() {\n            /* eslint no-multi-assign: 1 */\n            requireMapSlot(this, 'clear');\n            this._map = OrigMap ? new OrigMap() : null;\n            this._size = 0;\n            this._storage = emptyObject();\n            var head = this._head;\n            var i = head;\n            var p = i.next;\n            while ((i = p) !== head) {\n              i.key = empty;\n              i.value = empty;\n              p = i.next;\n              i.next = i.prev = head;\n            }\n            head.next = head.prev = head;\n          },\n\n          keys: function keys() {\n            requireMapSlot(this, 'keys');\n            return new MapIterator(this, 'key');\n          },\n\n          values: function values() {\n            requireMapSlot(this, 'values');\n            return new MapIterator(this, 'value');\n          },\n\n          entries: function entries() {\n            requireMapSlot(this, 'entries');\n            return new MapIterator(this, 'key+value');\n          },\n\n          forEach: function forEach(callback) {\n            requireMapSlot(this, 'forEach');\n            var context = arguments.length > 1 ? arguments[1] : null;\n            var it = this.entries();\n            for (var entry = it.next(); !entry.done; entry = it.next()) {\n              if (context) {\n                _call(callback, context, entry.value[1], entry.value[0], this);\n              } else {\n                callback(entry.value[1], entry.value[0], this);\n              }\n            }\n          }\n        });\n        addIterator(Map$prototype, Map$prototype.entries);\n\n        return MapShim;\n      }()),\n\n      Set: (function () {\n        var isSet = function isSet(set) {\n          return set._es6set && typeof set._storage !== 'undefined';\n        };\n        var requireSetSlot = function requireSetSlot(set, method) {\n          if (!ES.TypeIsObject(set) || !isSet(set)) {\n            // https://github.com/paulmillr/es6-shim/issues/176\n            throw new TypeError('Set.prototype.' + method + ' called on incompatible receiver ' + ES.ToString(set));\n          }\n        };\n\n        // Creating a Map is expensive.  To speed up the common case of\n        // Sets containing only string or numeric keys, we use an object\n        // as backing storage and lazily create a full Map only when\n        // required.\n        var Set$prototype;\n        var SetShim = function Set() {\n          if (!(this instanceof Set)) {\n            throw new TypeError('Constructor Set requires \"new\"');\n          }\n          if (this && this._es6set) {\n            throw new TypeError('Bad construction');\n          }\n          var set = emulateES6construct(this, Set, Set$prototype, {\n            _es6set: true,\n            '[[SetData]]': null,\n            _storage: emptyObject()\n          });\n          if (!set._es6set) {\n            throw new TypeError('bad set');\n          }\n\n          // Optionally initialize Set from iterable\n          if (arguments.length > 0) {\n            addIterableToSet(Set, set, arguments[0]);\n          }\n          return set;\n        };\n        Set$prototype = SetShim.prototype;\n\n        var decodeKey = function (key) {\n          var k = key;\n          if (k === '^null') {\n            return null;\n          } else if (k === '^undefined') {\n            return void 0;\n          } else {\n            var first = k.charAt(0);\n            if (first === '$') {\n              return _strSlice(k, 1);\n            } else if (first === 'n') {\n              return +_strSlice(k, 1);\n            } else if (first === 'b') {\n              return k === 'btrue';\n            }\n          }\n          return +k;\n        };\n        // Switch from the object backing storage to a full Map.\n        var ensureMap = function ensureMap(set) {\n          if (!set['[[SetData]]']) {\n            var m = new collectionShims.Map();\n            set['[[SetData]]'] = m;\n            _forEach(keys(set._storage), function (key) {\n              var k = decodeKey(key);\n              m.set(k, k);\n            });\n            set['[[SetData]]'] = m;\n          }\n          set._storage = null; // free old backing storage\n        };\n\n        Value.getter(SetShim.prototype, 'size', function () {\n          requireSetSlot(this, 'size');\n          if (this._storage) {\n            return keys(this._storage).length;\n          }\n          ensureMap(this);\n          return this['[[SetData]]'].size;\n        });\n\n        defineProperties(SetShim.prototype, {\n          has: function has(key) {\n            requireSetSlot(this, 'has');\n            var fkey;\n            if (this._storage && (fkey = fastkey(key)) !== null) {\n              return !!this._storage[fkey];\n            }\n            ensureMap(this);\n            return this['[[SetData]]'].has(key);\n          },\n\n          add: function add(key) {\n            requireSetSlot(this, 'add');\n            var fkey;\n            if (this._storage && (fkey = fastkey(key)) !== null) {\n              this._storage[fkey] = true;\n              return this;\n            }\n            ensureMap(this);\n            this['[[SetData]]'].set(key, key);\n            return this;\n          },\n\n          'delete': function (key) {\n            requireSetSlot(this, 'delete');\n            var fkey;\n            if (this._storage && (fkey = fastkey(key)) !== null) {\n              var hasFKey = _hasOwnProperty(this._storage, fkey);\n              return (delete this._storage[fkey]) && hasFKey;\n            }\n            ensureMap(this);\n            return this['[[SetData]]']['delete'](key);\n          },\n\n          clear: function clear() {\n            requireSetSlot(this, 'clear');\n            if (this._storage) {\n              this._storage = emptyObject();\n            }\n            if (this['[[SetData]]']) {\n              this['[[SetData]]'].clear();\n            }\n          },\n\n          values: function values() {\n            requireSetSlot(this, 'values');\n            ensureMap(this);\n            return new SetIterator(this['[[SetData]]'].values());\n          },\n\n          entries: function entries() {\n            requireSetSlot(this, 'entries');\n            ensureMap(this);\n            return new SetIterator(this['[[SetData]]'].entries());\n          },\n\n          forEach: function forEach(callback) {\n            requireSetSlot(this, 'forEach');\n            var context = arguments.length > 1 ? arguments[1] : null;\n            var entireSet = this;\n            ensureMap(entireSet);\n            this['[[SetData]]'].forEach(function (value, key) {\n              if (context) {\n                _call(callback, context, key, key, entireSet);\n              } else {\n                callback(key, key, entireSet);\n              }\n            });\n          }\n        });\n        defineProperty(SetShim.prototype, 'keys', SetShim.prototype.values, true);\n        addIterator(SetShim.prototype, SetShim.prototype.values);\n\n        var SetIterator = function SetIterator(it) {\n          this.it = it;\n        };\n        SetIterator.prototype = {\n          isSetIterator: true,\n          next: function next() {\n            if (!this.isSetIterator) {\n              throw new TypeError('Not a SetIterator');\n            }\n            return this.it.next();\n          }\n        };\n        addIterator(SetIterator.prototype);\n\n        return SetShim;\n      }())\n    };\n\n    var isGoogleTranslate = globals.Set && !Set.prototype['delete'] && Set.prototype.remove && Set.prototype.items && Set.prototype.map && Array.isArray(new Set().keys);\n    if (isGoogleTranslate) {\n      // special-case force removal of wildly invalid Set implementation in Google Translate iframes\n      // see https://github.com/paulmillr/es6-shim/issues/438 / https://twitter.com/ljharb/status/849335573114363904\n      globals.Set = collectionShims.Set;\n    }\n    if (globals.Map || globals.Set) {\n      // Safari 8, for example, doesn't accept an iterable.\n      var mapAcceptsArguments = valueOrFalseIfThrows(function () { return new Map([[1, 2]]).get(1) === 2; });\n      if (!mapAcceptsArguments) {\n        globals.Map = function Map() {\n          if (!(this instanceof Map)) {\n            throw new TypeError('Constructor Map requires \"new\"');\n          }\n          var m = new OrigMap();\n          if (arguments.length > 0) {\n            addIterableToMap(Map, m, arguments[0]);\n          }\n          delete m.constructor;\n          Object.setPrototypeOf(m, globals.Map.prototype);\n          return m;\n        };\n        globals.Map.prototype = create(OrigMap.prototype);\n        defineProperty(globals.Map.prototype, 'constructor', globals.Map, true);\n        Value.preserveToString(globals.Map, OrigMap);\n      }\n      var testMap = new Map();\n      var mapUsesSameValueZero = (function () {\n        // Chrome 38-42, node 0.11/0.12, iojs 1/2 also have a bug when the Map has a size > 4\n        var m = new Map([[1, 0], [2, 0], [3, 0], [4, 0]]);\n        m.set(-0, m);\n        return m.get(0) === m && m.get(-0) === m && m.has(0) && m.has(-0);\n      }());\n      var mapSupportsChaining = testMap.set(1, 2) === testMap;\n      if (!mapUsesSameValueZero || !mapSupportsChaining) {\n        overrideNative(Map.prototype, 'set', function set(k, v) {\n          _call(origMapSet, this, k === 0 ? 0 : k, v);\n          return this;\n        });\n      }\n      if (!mapUsesSameValueZero) {\n        defineProperties(Map.prototype, {\n          get: function get(k) {\n            return _call(origMapGet, this, k === 0 ? 0 : k);\n          },\n          has: function has(k) {\n            return _call(origMapHas, this, k === 0 ? 0 : k);\n          }\n        }, true);\n        Value.preserveToString(Map.prototype.get, origMapGet);\n        Value.preserveToString(Map.prototype.has, origMapHas);\n      }\n      var testSet = new Set();\n      var setUsesSameValueZero = Set.prototype['delete'] && Set.prototype.add && Set.prototype.has && (function (s) {\n        s['delete'](0);\n        s.add(-0);\n        return !s.has(0);\n      }(testSet));\n      var setSupportsChaining = testSet.add(1) === testSet;\n      if (!setUsesSameValueZero || !setSupportsChaining) {\n        var origSetAdd = Set.prototype.add;\n        Set.prototype.add = function add(v) {\n          _call(origSetAdd, this, v === 0 ? 0 : v);\n          return this;\n        };\n        Value.preserveToString(Set.prototype.add, origSetAdd);\n      }\n      if (!setUsesSameValueZero) {\n        var origSetHas = Set.prototype.has;\n        Set.prototype.has = function has(v) {\n          return _call(origSetHas, this, v === 0 ? 0 : v);\n        };\n        Value.preserveToString(Set.prototype.has, origSetHas);\n        var origSetDel = Set.prototype['delete'];\n        Set.prototype['delete'] = function SetDelete(v) {\n          return _call(origSetDel, this, v === 0 ? 0 : v);\n        };\n        Value.preserveToString(Set.prototype['delete'], origSetDel);\n      }\n      var mapSupportsSubclassing = supportsSubclassing(globals.Map, function (M) {\n        var m = new M([]);\n        // Firefox 32 is ok with the instantiating the subclass but will\n        // throw when the map is used.\n        m.set(42, 42);\n        return m instanceof M;\n      });\n      // without Object.setPrototypeOf, subclassing is not possible\n      var mapFailsToSupportSubclassing = Object.setPrototypeOf && !mapSupportsSubclassing;\n      var mapRequiresNew = (function () {\n        try {\n          return !(globals.Map() instanceof globals.Map);\n        } catch (e) {\n          return e instanceof TypeError;\n        }\n      }());\n      if (globals.Map.length !== 0 || mapFailsToSupportSubclassing || !mapRequiresNew) {\n        globals.Map = function Map() {\n          if (!(this instanceof Map)) {\n            throw new TypeError('Constructor Map requires \"new\"');\n          }\n          var m = new OrigMap();\n          if (arguments.length > 0) {\n            addIterableToMap(Map, m, arguments[0]);\n          }\n          delete m.constructor;\n          Object.setPrototypeOf(m, Map.prototype);\n          return m;\n        };\n        globals.Map.prototype = OrigMap.prototype;\n        defineProperty(globals.Map.prototype, 'constructor', globals.Map, true);\n        Value.preserveToString(globals.Map, OrigMap);\n      }\n      var setSupportsSubclassing = supportsSubclassing(globals.Set, function (S) {\n        var s = new S([]);\n        s.add(42, 42);\n        return s instanceof S;\n      });\n      // without Object.setPrototypeOf, subclassing is not possible\n      var setFailsToSupportSubclassing = Object.setPrototypeOf && !setSupportsSubclassing;\n      var setRequiresNew = (function () {\n        try {\n          return !(globals.Set() instanceof globals.Set);\n        } catch (e) {\n          return e instanceof TypeError;\n        }\n      }());\n      if (globals.Set.length !== 0 || setFailsToSupportSubclassing || !setRequiresNew) {\n        var OrigSet = globals.Set;\n        globals.Set = function Set() {\n          if (!(this instanceof Set)) {\n            throw new TypeError('Constructor Set requires \"new\"');\n          }\n          var s = new OrigSet();\n          if (arguments.length > 0) {\n            addIterableToSet(Set, s, arguments[0]);\n          }\n          delete s.constructor;\n          Object.setPrototypeOf(s, Set.prototype);\n          return s;\n        };\n        globals.Set.prototype = OrigSet.prototype;\n        defineProperty(globals.Set.prototype, 'constructor', globals.Set, true);\n        Value.preserveToString(globals.Set, OrigSet);\n      }\n      var newMap = new globals.Map();\n      var mapIterationThrowsStopIterator = !valueOrFalseIfThrows(function () {\n        return newMap.keys().next().done;\n      });\n      /*\n        - In Firefox < 23, Map#size is a function.\n        - In all current Firefox, Set#entries/keys/values & Map#clear do not exist\n        - https://bugzilla.mozilla.org/show_bug.cgi?id=869996\n        - In Firefox 24, Map and Set do not implement forEach\n        - In Firefox 25 at least, Map and Set are callable without \"new\"\n      */\n      if (\n        typeof globals.Map.prototype.clear !== 'function' ||\n        new globals.Set().size !== 0 ||\n        newMap.size !== 0 ||\n        typeof globals.Map.prototype.keys !== 'function' ||\n        typeof globals.Set.prototype.keys !== 'function' ||\n        typeof globals.Map.prototype.forEach !== 'function' ||\n        typeof globals.Set.prototype.forEach !== 'function' ||\n        isCallableWithoutNew(globals.Map) ||\n        isCallableWithoutNew(globals.Set) ||\n        typeof newMap.keys().next !== 'function' || // Safari 8\n        mapIterationThrowsStopIterator || // Firefox 25\n        !mapSupportsSubclassing\n      ) {\n        defineProperties(globals, {\n          Map: collectionShims.Map,\n          Set: collectionShims.Set\n        }, true);\n      }\n\n      if (globals.Set.prototype.keys !== globals.Set.prototype.values) {\n        // Fixed in WebKit with https://bugs.webkit.org/show_bug.cgi?id=144190\n        defineProperty(globals.Set.prototype, 'keys', globals.Set.prototype.values, true);\n      }\n\n      // Shim incomplete iterator implementations.\n      addIterator(Object.getPrototypeOf((new globals.Map()).keys()));\n      addIterator(Object.getPrototypeOf((new globals.Set()).keys()));\n\n      if (functionsHaveNames && globals.Set.prototype.has.name !== 'has') {\n        // Microsoft Edge v0.11.10074.0 is missing a name on Set#has\n        var anonymousSetHas = globals.Set.prototype.has;\n        overrideNative(globals.Set.prototype, 'has', function has(key) {\n          return _call(anonymousSetHas, this, key);\n        });\n      }\n    }\n    defineProperties(globals, collectionShims);\n    addDefaultSpecies(globals.Map);\n    addDefaultSpecies(globals.Set);\n  }\n\n  var throwUnlessTargetIsObject = function throwUnlessTargetIsObject(target) {\n    if (!ES.TypeIsObject(target)) {\n      throw new TypeError('target must be an object');\n    }\n  };\n\n  // Some Reflect methods are basically the same as\n  // those on the Object global, except that a TypeError is thrown if\n  // target isn't an object. As well as returning a boolean indicating\n  // the success of the operation.\n  var ReflectShims = {\n    // Apply method in a functional form.\n    apply: function apply() {\n      return ES.Call(ES.Call, null, arguments);\n    },\n\n    // New operator in a functional form.\n    construct: function construct(constructor, args) {\n      if (!ES.IsConstructor(constructor)) {\n        throw new TypeError('First argument must be a constructor.');\n      }\n      var newTarget = arguments.length > 2 ? arguments[2] : constructor;\n      if (!ES.IsConstructor(newTarget)) {\n        throw new TypeError('new.target must be a constructor.');\n      }\n      return ES.Construct(constructor, args, newTarget, 'internal');\n    },\n\n    // When deleting a non-existent or configurable property,\n    // true is returned.\n    // When attempting to delete a non-configurable property,\n    // it will return false.\n    deleteProperty: function deleteProperty(target, key) {\n      throwUnlessTargetIsObject(target);\n      if (supportsDescriptors) {\n        var desc = Object.getOwnPropertyDescriptor(target, key);\n\n        if (desc && !desc.configurable) {\n          return false;\n        }\n      }\n\n      // Will return true.\n      return delete target[key];\n    },\n\n    has: function has(target, key) {\n      throwUnlessTargetIsObject(target);\n      return key in target;\n    }\n  };\n\n  if (Object.getOwnPropertyNames) {\n    Object.assign(ReflectShims, {\n      // Basically the result of calling the internal [[OwnPropertyKeys]].\n      // Concatenating propertyNames and propertySymbols should do the trick.\n      // This should continue to work together with a Symbol shim\n      // which overrides Object.getOwnPropertyNames and implements\n      // Object.getOwnPropertySymbols.\n      ownKeys: function ownKeys(target) {\n        throwUnlessTargetIsObject(target);\n        var keys = Object.getOwnPropertyNames(target);\n\n        if (ES.IsCallable(Object.getOwnPropertySymbols)) {\n          _pushApply(keys, Object.getOwnPropertySymbols(target));\n        }\n\n        return keys;\n      }\n    });\n  }\n\n  var callAndCatchException = function ConvertExceptionToBoolean(func) {\n    return !throwsError(func);\n  };\n\n  if (Object.preventExtensions) {\n    Object.assign(ReflectShims, {\n      isExtensible: function isExtensible(target) {\n        throwUnlessTargetIsObject(target);\n        return Object.isExtensible(target);\n      },\n      preventExtensions: function preventExtensions(target) {\n        throwUnlessTargetIsObject(target);\n        return callAndCatchException(function () {\n          return Object.preventExtensions(target);\n        });\n      }\n    });\n  }\n\n  if (supportsDescriptors) {\n    var internalGet = function get(target, key, receiver) {\n      var desc = Object.getOwnPropertyDescriptor(target, key);\n\n      if (!desc) {\n        var parent = Object.getPrototypeOf(target);\n\n        if (parent === null) {\n          return void 0;\n        }\n\n        return internalGet(parent, key, receiver);\n      }\n\n      if ('value' in desc) {\n        return desc.value;\n      }\n\n      if (desc.get) {\n        return ES.Call(desc.get, receiver);\n      }\n\n      return void 0;\n    };\n\n    var internalSet = function set(target, key, value, receiver) {\n      var desc = Object.getOwnPropertyDescriptor(target, key);\n\n      if (!desc) {\n        var parent = Object.getPrototypeOf(target);\n\n        if (parent !== null) {\n          return internalSet(parent, key, value, receiver);\n        }\n\n        desc = {\n          value: void 0,\n          writable: true,\n          enumerable: true,\n          configurable: true\n        };\n      }\n\n      if ('value' in desc) {\n        if (!desc.writable) {\n          return false;\n        }\n\n        if (!ES.TypeIsObject(receiver)) {\n          return false;\n        }\n\n        var existingDesc = Object.getOwnPropertyDescriptor(receiver, key);\n\n        if (existingDesc) {\n          return Reflect.defineProperty(receiver, key, {\n            value: value\n          });\n        } else {\n          return Reflect.defineProperty(receiver, key, {\n            value: value,\n            writable: true,\n            enumerable: true,\n            configurable: true\n          });\n        }\n      }\n\n      if (desc.set) {\n        _call(desc.set, receiver, value);\n        return true;\n      }\n\n      return false;\n    };\n\n    Object.assign(ReflectShims, {\n      defineProperty: function defineProperty(target, propertyKey, attributes) {\n        throwUnlessTargetIsObject(target);\n        return callAndCatchException(function () {\n          return Object.defineProperty(target, propertyKey, attributes);\n        });\n      },\n\n      getOwnPropertyDescriptor: function getOwnPropertyDescriptor(target, propertyKey) {\n        throwUnlessTargetIsObject(target);\n        return Object.getOwnPropertyDescriptor(target, propertyKey);\n      },\n\n      // Syntax in a functional form.\n      get: function get(target, key) {\n        throwUnlessTargetIsObject(target);\n        var receiver = arguments.length > 2 ? arguments[2] : target;\n\n        return internalGet(target, key, receiver);\n      },\n\n      set: function set(target, key, value) {\n        throwUnlessTargetIsObject(target);\n        var receiver = arguments.length > 3 ? arguments[3] : target;\n\n        return internalSet(target, key, value, receiver);\n      }\n    });\n  }\n\n  if (Object.getPrototypeOf) {\n    var objectDotGetPrototypeOf = Object.getPrototypeOf;\n    ReflectShims.getPrototypeOf = function getPrototypeOf(target) {\n      throwUnlessTargetIsObject(target);\n      return objectDotGetPrototypeOf(target);\n    };\n  }\n\n  if (Object.setPrototypeOf && ReflectShims.getPrototypeOf) {\n    var willCreateCircularPrototype = function (object, lastProto) {\n      var proto = lastProto;\n      while (proto) {\n        if (object === proto) {\n          return true;\n        }\n        proto = ReflectShims.getPrototypeOf(proto);\n      }\n      return false;\n    };\n\n    Object.assign(ReflectShims, {\n      // Sets the prototype of the given object.\n      // Returns true on success, otherwise false.\n      setPrototypeOf: function setPrototypeOf(object, proto) {\n        throwUnlessTargetIsObject(object);\n        if (proto !== null && !ES.TypeIsObject(proto)) {\n          throw new TypeError('proto must be an object or null');\n        }\n\n        // If they already are the same, we're done.\n        if (proto === Reflect.getPrototypeOf(object)) {\n          return true;\n        }\n\n        // Cannot alter prototype if object not extensible.\n        if (Reflect.isExtensible && !Reflect.isExtensible(object)) {\n          return false;\n        }\n\n        // Ensure that we do not create a circular prototype chain.\n        if 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overrideNative(globals.Reflect, 'getPrototypeOf', function getPrototypeOf(target) {\n      return _call(originalReflectGetProto, globals.Reflect, target);\n    });\n  }\n  if (globals.Reflect.setPrototypeOf) {\n    if (valueOrFalseIfThrows(function () {\n      globals.Reflect.setPrototypeOf(1, {});\n      return true;\n    })) {\n      overrideNative(globals.Reflect, 'setPrototypeOf', ReflectShims.setPrototypeOf);\n    }\n  }\n  if (globals.Reflect.defineProperty) {\n    if (!valueOrFalseIfThrows(function () {\n      var basic = !globals.Reflect.defineProperty(1, 'test', { value: 1 });\n      // \"extensible\" fails on Edge 0.12\n      var extensible = typeof Object.preventExtensions !== 'function' || !globals.Reflect.defineProperty(Object.preventExtensions({}), 'test', {});\n      return basic && extensible;\n    })) {\n      overrideNative(globals.Reflect, 'defineProperty', ReflectShims.defineProperty);\n    }\n  }\n  if (globals.Reflect.construct) {\n    if 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