diff --git a/src/ios/RealmJS.xcodeproj/project.pbxproj b/src/ios/RealmJS.xcodeproj/project.pbxproj
index 3dd31948..b12a7d69 100644
--- a/src/ios/RealmJS.xcodeproj/project.pbxproj
+++ b/src/ios/RealmJS.xcodeproj/project.pbxproj
@@ -100,6 +100,7 @@
 
 /* Begin PBXFileReference section */
 		02409DC11BCF11D6005F3B3E /* RealmJSCoreTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = RealmJSCoreTests.m; path = ios/RealmJSCoreTests.m; sourceTree = "<group>"; };
+		025678951CAB392000FB8501 /* types.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; name = types.hpp; path = jsc/types.hpp; sourceTree = "<group>"; };
 		0270BC5A1B7CFC1300010E03 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		0270BC781B7D020100010E03 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = Info.plist; path = ios/Info.plist; sourceTree = "<group>"; };
 		0270BC7A1B7D020100010E03 /* RealmJSTests.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = RealmJSTests.h; path = ios/RealmJSTests.h; sourceTree = "<group>"; };
@@ -261,6 +262,7 @@
 				0290480D1C0428DF00ABDED4 /* js_util.cpp */,
 				0290480E1C0428DF00ABDED4 /* js_util.hpp */,
 				02AFE5B11CAB133500953DA3 /* js_compat.hpp */,
+				025678951CAB392000FB8501 /* types.hpp */,
 				02AFE5871CA9B23400953DA3 /* jsc_list.cpp */,
 				02AFE5881CA9B23400953DA3 /* jsc_list.hpp */,
 				029048351C042A3C00ABDED4 /* platform.hpp */,
diff --git a/src/js_object.cpp b/src/js_object.cpp
index 718a5b1a..505a2505 100644
--- a/src/js_object.cpp
+++ b/src/js_object.cpp
@@ -74,9 +74,10 @@ JSClassRef RJSObjectClass() {
 JSObjectRef RJSObjectCreate(JSContextRef ctx, Object object) {
     static JSStringRef prototypeString = JSStringCreateWithUTF8CString("prototype");
 
-    JSObjectRef constructor = RJSConstructors(object.realm().get())[object.get_object_schema().name];
+    auto delegate = realm::js::get_delegate<jsc::Types>(object.realm().get());
+    JSObjectRef constructor = delegate->m_constructors[object.get_object_schema().name];
     JSObjectRef prototype = constructor ? RJSValidatedObjectProperty(ctx, constructor, prototypeString) : NULL;
-    JSObjectRef jsObject = RJSWrapObject(ctx, RJSObjectClass(), new Object(object), prototype);
+    JSObjectRef jsObject = realm::js::WrapObject(ctx, RJSObjectClass(), new Object(object), prototype);
 
     if (constructor) {
         JSValueRef exception = NULL;
@@ -117,12 +118,12 @@ template<> JSValueRef RJSAccessor::dict_value_for_key(JSContextRef ctx, JSValueR
 }
 
 template<> bool RJSAccessor::has_default_value_for_property(JSContextRef ctx, Realm *realm, const ObjectSchema &object_schema, const std::string &prop_name) {
-    ObjectDefaults &defaults = RJSDefaults(realm)[object_schema.name];
+    auto defaults = realm::js::get_delegate<jsc::Types>(realm)->m_defaults[object_schema.name];
     return defaults.find(prop_name) != defaults.end();
 }
 
 template<> JSValueRef RJSAccessor::default_value_for_property(JSContextRef ctx, Realm *realm, const ObjectSchema &object_schema, const std::string &prop_name) {
-    ObjectDefaults &defaults = RJSDefaults(realm)[object_schema.name];
+    auto defaults = realm::js::get_delegate<jsc::Types>(realm)->m_defaults[object_schema.name];
     return defaults[prop_name];
 }
 
diff --git a/src/js_realm.cpp b/src/js_realm.cpp
index a6689ef9..a9ce6f2f 100644
--- a/src/js_realm.cpp
+++ b/src/js_realm.cpp
@@ -29,99 +29,12 @@
 #include "binding_context.hpp"
 #include "results.hpp"
 
-#include <set>
 #include <cassert>
 
+
 using namespace realm;
 using RJSAccessor = realm::NativeAccessor<JSValueRef, JSContextRef>;
 
-class RJSRealmDelegate : public BindingContext {
-public:
-    virtual void changes_available() {
-        assert(0);
-    }
-    virtual void did_change(std::vector<ObserverState> const& observers, std::vector<void*> const& invalidated) {
-        notify("change");
-    }
-    virtual std::vector<ObserverState> get_observed_rows() {
-        return std::vector<ObserverState>();
-    }
-    virtual void will_change(std::vector<ObserverState> const& observers,
-                             std::vector<void*> const& invalidated) {}
-
-    RJSRealmDelegate(WeakRealm realm, JSGlobalContextRef ctx) : m_context(ctx), m_realm(realm) {
-        JSGlobalContextRetain(m_context);
-    }
-
-    ~RJSRealmDelegate() {
-        remove_all_notifications();
-
-        for (auto constructor : m_constructors) {
-            JSValueUnprotect(m_context, constructor.second);
-        }
-        for (auto objectDefaults : m_defaults) {
-            for (auto value : objectDefaults.second) {
-                JSValueUnprotect(m_context, value.second);
-            }
-        }
-        JSGlobalContextRelease(m_context);
-    }
-
-    void add_notification(JSObjectRef notification) {
-        if (!m_notifications.count(notification)) {
-            JSValueProtect(m_context, notification);
-            m_notifications.insert(notification);
-        }
-    }
-    void remove_notification(JSObjectRef notification) {
-        if (m_notifications.count(notification)) {
-            JSValueUnprotect(m_context, notification);
-            m_notifications.erase(notification);
-        }
-    }
-    void remove_all_notifications() {
-        for (auto notification : m_notifications) {
-            JSValueUnprotect(m_context, notification);
-        }
-        m_notifications.clear();
-    }
-
-    std::map<std::string, ObjectDefaults> m_defaults;
-    std::map<std::string, JSObjectRef> m_constructors;
-
-  private:
-    std::set<JSObjectRef> m_notifications;
-    JSGlobalContextRef m_context;
-    WeakRealm m_realm;
-
-    void notify(const char *notification_name) {
-        JSValueRef arguments[2];
-        SharedRealm realm = m_realm.lock();
-        if (!realm) {
-            throw std::runtime_error("Realm no longer exists");
-        }
-        JSObjectRef realm_object = RJSWrapObject<SharedRealm *>(m_context, RJSRealmClass(), new SharedRealm(realm));
-        arguments[0] = realm_object;
-        arguments[1] = RJSValueForString(m_context, notification_name);
-
-        for (auto callback : m_notifications) {
-            JSValueRef ex = NULL;
-            JSObjectCallAsFunction(m_context, callback, realm_object, 2, arguments, &ex);
-            if (ex) {
-                throw RJSException(m_context, ex);
-            }
-        }
-    }
-};
-
-std::map<std::string, ObjectDefaults> &RJSDefaults(Realm *realm) {
-    return static_cast<RJSRealmDelegate *>(realm->m_binding_context.get())->m_defaults;
-}
-
-std::map<std::string, JSObjectRef> &RJSConstructors(Realm *realm) {
-    return static_cast<RJSRealmDelegate *>(realm->m_binding_context.get())->m_constructors;
-}
-
 // static std::string s_defaultPath = realm::default_realm_file_directory() + "/default.realm";
 static std::string s_defaultPath = "";
 std::string RJSDefaultPath() {
@@ -214,12 +127,13 @@ JSObjectRef RealmConstructor(JSContextRef ctx, JSObjectRef constructor, size_t a
         
         ensure_directory_exists_for_file(config.path);
         SharedRealm realm = Realm::get_shared_realm(config);
+        auto delegate = new js::RealmDelegate<jsc::Types>(realm, JSContextGetGlobalContext(ctx));
         if (!realm->m_binding_context) {
-            realm->m_binding_context.reset(new RJSRealmDelegate(realm, JSContextGetGlobalContext(ctx)));
+            realm->m_binding_context.reset(delegate);
         }
-        RJSDefaults(realm.get()) = defaults;
-        RJSConstructors(realm.get()) = constructors;
-        return RJSWrapObject<SharedRealm *>(ctx, RJSRealmClass(), new SharedRealm(realm));
+        delegate->m_defaults = defaults;
+        delegate->m_constructors = constructors;
+        return js::WrapObject(ctx, RJSRealmClass(), new SharedRealm(realm));
     }
     catch (std::exception &ex) {
         if (jsException) {
@@ -299,7 +213,8 @@ std::string RJSValidatedObjectTypeForValue(SharedRealm &realm, JSContextRef ctx,
     if (JSValueIsObject(ctx, value) && JSObjectIsConstructor(ctx, (JSObjectRef)value)) {
         JSObjectRef constructor = (JSObjectRef)value;
 
-        for (auto pair : RJSConstructors(realm.get())) {
+        auto delegate = js::get_delegate<jsc::Types>(realm.get());
+        for (auto pair : delegate->m_constructors) {
             if (pair.second == constructor) {
                 return pair.first;
             }
@@ -453,7 +368,7 @@ void RealmAddListener(ContextType ctx, ObjectType thisObject, size_t argumentCou
         auto callback = RJSValidatedValueToFunction(ctx, arguments[1]);
 
         SharedRealm realm = *RJSGetInternal<SharedRealm *>(thisObject);
-        static_cast<RJSRealmDelegate *>(realm->m_binding_context.get())->add_notification(callback);
+        static_cast<js::RealmDelegate<jsc::Types> *>(realm->m_binding_context.get())->add_notification(callback);
     }
     catch (std::exception &exp) {
         RJSSetException(ctx, exceptionObject, exp);
@@ -467,7 +382,7 @@ void RealmRemoveListener(ContextType ctx, ObjectType thisObject, size_t argument
         auto callback = RJSValidatedValueToFunction(ctx, arguments[1]);
 
         SharedRealm realm = *RJSGetInternal<SharedRealm *>(thisObject);
-        static_cast<RJSRealmDelegate *>(realm->m_binding_context.get())->remove_notification(callback);
+        static_cast<js::RealmDelegate<jsc::Types> *>(realm->m_binding_context.get())->remove_notification(callback);
     }
     catch (std::exception &exp) {
         RJSSetException(ctx, exceptionObject, exp);
@@ -482,7 +397,7 @@ void RealmRemoveAllListeners(ContextType ctx, ObjectType thisObject, size_t argu
         }
 
         SharedRealm realm = *RJSGetInternal<SharedRealm *>(thisObject);
-        static_cast<RJSRealmDelegate *>(realm->m_binding_context.get())->remove_all_notifications();
+        static_cast<js::RealmDelegate<jsc::Types> *>(realm->m_binding_context.get())->remove_all_notifications();
     }
     catch (std::exception &exp) {
         RJSSetException(ctx, exceptionObject, exp);
@@ -527,3 +442,10 @@ JSClassRef RJSRealmClass() {
     static JSClassRef s_realmClass = RJSCreateWrapperClass<SharedRealm *>("Realm", RealmGetProperty, NULL, RJSRealmFuncs);
     return s_realmClass;
 }
+
+
+namespace realm {
+namespace js {
+JSClassRef RealmClass() { return RJSRealmClass(); };
+}
+}
diff --git a/src/js_realm.hpp b/src/js_realm.hpp
index 167e64bd..54c1c443 100644
--- a/src/js_realm.hpp
+++ b/src/js_realm.hpp
@@ -19,11 +19,101 @@
 #pragma once
 
 #include "js_util.hpp"
+#include "shared_realm.hpp"
+#include "binding_context.hpp"
 #include <map>
+#include <set>
 
 namespace realm {
-    class Realm;
-    using ObjectDefaults = std::map<std::string, JSValueRef>;
+namespace js {
+
+template<typename T>
+class RealmDelegate : public BindingContext {
+  public:
+    using GlobalContextType = typename T::GlobalContext;
+    using ObjectClassType = typename T::ObjectClass;
+    using ObjectType = typename T::Object;
+    using ValueType = typename T::Value;
+    using ObjectDefaults = std::map<std::string, ValueType>;
+
+    virtual void did_change(std::vector<ObserverState> const& observers, std::vector<void*> const& invalidated) {
+        notify("change");
+    }
+    virtual std::vector<ObserverState> get_observed_rows() {
+        return std::vector<ObserverState>();
+    }
+    virtual void will_change(std::vector<ObserverState> const& observers, std::vector<void*> const& invalidated) {}
+
+    RealmDelegate(std::weak_ptr<Realm> realm, GlobalContextType ctx) : m_context(ctx), m_realm(realm) {
+        GlobalContextProtect(m_context);
+    }
+    ~RealmDelegate() {
+        remove_all_notifications();
+
+        for (auto constructor : m_constructors) {
+            ValueUnprotect(m_context, constructor.second);
+        }
+        for (auto objectDefaults : m_defaults) {
+            for (auto value : objectDefaults.second) {
+                ValueUnprotect(m_context, value.second);
+            }
+        }
+        GlobalContextUnprotect(m_context);
+    }
+
+    void add_notification(JSObjectRef notification) {
+        if (!m_notifications.count(notification)) {
+            ValueProtect(m_context, notification);
+            m_notifications.insert(notification);
+        }
+    }
+    void remove_notification(JSObjectRef notification) {
+        if (m_notifications.count(notification)) {
+            ValueUnprotect(m_context, notification);
+            m_notifications.erase(notification);
+        }
+    }
+    void remove_all_notifications() {
+        for (auto notification : m_notifications) {
+            ValueUnprotect(m_context, notification);
+        }
+        m_notifications.clear();
+    }
+
+    std::map<std::string, ObjectDefaults> m_defaults;
+    std::map<std::string, ObjectType> m_constructors;
+
+private:
+    std::set<ObjectType> m_notifications;
+    GlobalContextType m_context;
+    std::weak_ptr<Realm> m_realm;
+    
+    void notify(const char *notification_name) {
+        JSValueRef arguments[2];
+        SharedRealm realm = m_realm.lock();
+        if (!realm) {
+            throw std::runtime_error("Realm no longer exists");
+        }
+        ObjectType realm_object = WrapObject<SharedRealm *>(m_context, realm::js::RealmClass(), new SharedRealm(realm));
+        arguments[0] = realm_object;
+        arguments[1] = RJSValueForString(m_context, notification_name);
+
+        for (auto callback : m_notifications) {
+            JSValueRef ex = NULL;
+            ObjectCallAsFunction(m_context, callback, realm_object, 2, arguments, ex);
+            if (ex) {
+                throw RJSException(m_context, ex);
+            }
+        }
+    }
+};
+
+template<typename T>
+static RealmDelegate<T> *get_delegate(Realm *realm) {
+    return dynamic_cast<realm::js::RealmDelegate<T> *>(realm->m_binding_context.get());
+}
+
+}
 }
 
 JSClassRef RJSRealmClass();
@@ -32,5 +122,3 @@ JSClassRef RJSRealmConstructorClass();
 std::string RJSDefaultPath();
 void RJSSetDefaultPath(std::string path);
 
-std::map<std::string, realm::ObjectDefaults> &RJSDefaults(realm::Realm *realm);
-std::map<std::string, JSObjectRef> &RJSConstructors(realm::Realm *realm);
diff --git a/src/js_results.cpp b/src/js_results.cpp
index a332f224..4ce6f159 100644
--- a/src/js_results.cpp
+++ b/src/js_results.cpp
@@ -96,7 +96,7 @@ JSValueRef ResultsStaticCopy(JSContextRef ctx, JSObjectRef function, JSObjectRef
         Results *copy = new Results(*results);
         copy->set_live(false);
 
-        return RJSWrapObject<Results *>(ctx, RJSResultsClass(), copy);
+        return js::WrapObject<Results *>(ctx, RJSResultsClass(), copy);
     }
     catch (std::exception &exp) {
         if (jsException) {
@@ -144,7 +144,7 @@ JSObjectRef RJSResultsCreate(JSContextRef ctx, SharedRealm realm, std::string cl
     if (object_schema == realm->config().schema->end()) {
         throw std::runtime_error("Object type '" + className + "' not present in Realm.");
     }
-    return RJSWrapObject<Results *>(ctx, RJSResultsClass(), new Results(realm, *object_schema, *table));
+    return js::WrapObject<Results *>(ctx, RJSResultsClass(), new Results(realm, *object_schema, *table));
 }
 
 JSObjectRef RJSResultsCreate(JSContextRef ctx, SharedRealm realm, std::string className, std::string queryString, std::vector<JSValueRef> args) {
@@ -159,14 +159,14 @@ JSObjectRef RJSResultsCreate(JSContextRef ctx, SharedRealm realm, std::string cl
     query_builder::ArgumentConverter<JSValueRef, JSContextRef> arguments(ctx, args);
     query_builder::apply_predicate(query, predicate, arguments, schema, object_schema->name);
 
-    return RJSWrapObject<Results *>(ctx, RJSResultsClass(), new Results(realm, *object_schema, std::move(query)));
+    return js::WrapObject<Results *>(ctx, RJSResultsClass(), new Results(realm, *object_schema, std::move(query)));
 }
 
 JSObjectRef RJSResultsCreate(JSContextRef ctx, SharedRealm realm, const ObjectSchema &objectSchema, Query query, bool live) {
     Results *results = new Results(realm, objectSchema, std::move(query));
     results->set_live(live);
 
-    return RJSWrapObject<Results *>(ctx, RJSResultsClass(), results);
+    return js::WrapObject<Results *>(ctx, js::ResultsClass(), results);
 }
 
 JSObjectRef RJSResultsCreateFiltered(JSContextRef ctx, SharedRealm realm, const ObjectSchema &objectSchema, Query query, size_t argumentCount, const JSValueRef arguments[]) {
@@ -233,7 +233,7 @@ JSObjectRef RJSResultsCreateSorted(JSContextRef ctx, SharedRealm realm, const Ob
     }
 
     Results *results = new Results(realm, objectSchema, std::move(query), {std::move(columns), std::move(ascending)});
-    return RJSWrapObject<Results *>(ctx, RJSResultsClass(), results);
+    return js::WrapObject<Results *>(ctx, js::ResultsClass(), results);
 }
 
 static const JSStaticFunction RJSResultsFuncs[] = {
@@ -247,3 +247,9 @@ JSClassRef RJSResultsClass() {
     static JSClassRef s_objectClass = RJSCreateWrapperClass<Results *>("Results", ResultsGetProperty, ResultsSetProperty, RJSResultsFuncs, ResultsPropertyNames, RJSCollectionClass());
     return s_objectClass;
 }
+
+namespace realm {
+namespace js {
+JSClassRef ResultsClass() { return RJSResultsClass(); };
+}
+}
diff --git a/src/js_schema.cpp b/src/js_schema.cpp
index 1bbc83da..e803fcc9 100644
--- a/src/js_schema.cpp
+++ b/src/js_schema.cpp
@@ -42,7 +42,7 @@ JSObjectRef RJSSchemaCreate(JSContextRef ctx, Schema &schema) {
     SchemaWrapper *wrapper = new SchemaWrapper();
     wrapper->schema = &schema;
     wrapper->owned = false;
-    return RJSWrapObject(ctx, RJSSchemaClass(), wrapper);
+    return js::WrapObject(ctx, RJSSchemaClass(), wrapper);
 }
 
 static inline Property RJSParseProperty(JSContextRef ctx, JSValueRef propertyAttributes, std::string propertyName, ObjectDefaults &objectDefaults) {
diff --git a/src/js_util.hpp b/src/js_util.hpp
index 72c891c6..83331eb1 100644
--- a/src/js_util.hpp
+++ b/src/js_util.hpp
@@ -53,15 +53,6 @@ inline void RJSFinalize(JSObjectRef object) {
     JSObjectSetPrivate(object, NULL);
 }
 
-template<typename T>
-inline JSObjectRef RJSWrapObject(JSContextRef ctx, JSClassRef jsClass, T object, JSValueRef prototype = NULL) {
-    JSObjectRef ref = JSObjectMake(ctx, jsClass, (void *)object);
-    if (prototype) {
-        JSObjectSetPrototype(ctx, ref, prototype);
-    }
-    return ref;
-}
-
 template<typename T>
 inline T RJSGetInternal(JSObjectRef jsObject) {
     return static_cast<T>(JSObjectGetPrivate(jsObject));
diff --git a/src/jsc/js_compat.hpp b/src/jsc/js_compat.hpp
index 8e36cd85..1065b23c 100644
--- a/src/jsc/js_compat.hpp
+++ b/src/jsc/js_compat.hpp
@@ -23,7 +23,7 @@
 
 namespace realm {
 namespace js {
-    
+
 static bool ValueIsUndefined(jsc::Types::Context ctx, jsc::Types::Value value) { return JSValueIsUndefined(ctx, value); }
 static bool ValueIsNull(jsc::Types::Context ctx, jsc::Types::Value value) { return JSValueIsNull(ctx, value); }
 static bool ValueIsBoolean(jsc::Types::Context ctx, jsc::Types::Value value) { return JSValueIsBoolean(ctx, value); }
@@ -31,4 +31,27 @@ static bool ValueIsNumber(jsc::Types::Context ctx, jsc::Types::Value value) { re
 static bool ValueIsString(jsc::Types::Context ctx, jsc::Types::Value value) { return JSValueIsString(ctx, value); }
 static bool ValueIsObject(jsc::Types::Context ctx, jsc::Types::Value value) { return JSValueIsObject(ctx, value); }
 
-}}
\ No newline at end of file
+static void ValueProtect(jsc::Types::Context ctx, jsc::Types::Value value) { JSValueProtect(ctx, value); }
+static void ValueUnprotect(jsc::Types::Context ctx, jsc::Types::Value value) { JSValueUnprotect(ctx, value); }
+
+static void ObjectCallAsFunction(jsc::Types::Context ctx, jsc::Types::Object function, jsc::Types::Object thisObject, size_t argsCount, const jsc::Types::Value args[], jsc::Types::Exception &exception) {
+    JSObjectCallAsFunction(ctx, function, thisObject, argsCount, args, &exception);
+}
+
+static void GlobalContextProtect(jsc::Types::GlobalContext ctx) { JSGlobalContextRetain(ctx); }
+static void GlobalContextUnprotect(jsc::Types::GlobalContext ctx) { JSGlobalContextRelease(ctx); }
+
+template<class T>
+static jsc::Types::Object WrapObject(jsc::Types::Context ctx, jsc::Types::ObjectClass objectClass, T internal, jsc::Types::Object prototype = nullptr) {
+    JSObjectRef ref = JSObjectMake(ctx, objectClass, (void *)internal);
+    if (prototype) {
+        JSObjectSetPrototype(ctx, ref, prototype);
+    }
+    return ref;
+}
+
+static jsc::Types::ObjectClass RealmClass();
+static jsc::Types::ObjectClass ListClass();
+static jsc::Types::ObjectClass ResultsClass();
+
+}}
diff --git a/src/jsc/jsc_list.cpp b/src/jsc/jsc_list.cpp
index dc059cd6..33fe20c5 100644
--- a/src/jsc/jsc_list.cpp
+++ b/src/jsc/jsc_list.cpp
@@ -97,7 +97,7 @@ WRAP_CLASS_METHOD(RJSList, Filtered)
 WRAP_CLASS_METHOD(RJSList, Sorted)
 
 JSObjectRef RJSListCreate(JSContextRef ctx, List &list) {
-    return RJSWrapObject<List *>(ctx, RJSListClass(), new List(list));
+    return realm::js::WrapObject<List *>(ctx, realm::js::ListClass(), new List(list));
 }
 
 static const JSStaticFunction RJSListFuncs[] = {
@@ -116,3 +116,9 @@ JSClassRef RJSListClass() {
     static JSClassRef s_listClass = RJSCreateWrapperClass<List *>("List", ListGetProperty, ListSetProperty, RJSListFuncs, ListPropertyNames, RJSCollectionClass());
     return s_listClass;
 }
+
+namespace realm {
+namespace js {
+JSClassRef ListClass() { return RJSListClass(); };
+}
+}
diff --git a/src/jsc/types.hpp b/src/jsc/types.hpp
index b5f8db3d..ffb8076a 100644
--- a/src/jsc/types.hpp
+++ b/src/jsc/types.hpp
@@ -27,6 +27,8 @@ namespace jsc {
  
 struct Types {
     using Context = JSContextRef;
+    using GlobalContext = JSGlobalContextRef;
+    using ObjectClass = JSClassRef;
     using Value = JSValueRef;
     using Object = JSObjectRef;
     using String = JSStringRef;