diff --git a/bind/objc/testpkg/objc_testpkg/reference/GoTestpkg.h b/bind/objc/testpkg/objc_testpkg/reference/GoTestpkg.h
deleted file mode 100644
index 08227f4..0000000
--- a/bind/objc/testpkg/objc_testpkg/reference/GoTestpkg.h
+++ /dev/null
@@ -1,57 +0,0 @@
-// Objective-C API for talking to golang.org/x/mobile/bind/objc/testpkg Go package.
-//   gobind -lang=objc golang.org/x/mobile/bind/objc/testpkg
-//
-// File is generated by gobind. Do not edit.
-
-#ifndef __GoTestpkg_H__
-#define __GoTestpkg_H__
-
-#include <Foundation/Foundation.h>
-
-@protocol GoTestpkgI
-- (void)Fn:(int32_t)v;
-@end
-
-@interface GoTestpkgI : NSObject {
-}
-@property (strong, readonly) id ref;
-@property (weak, readonly, nonatomic) id delegate;
-
-- (void)call:(int)code in:(void *)in out:(void *)out;
-@end
-
-@class GoTestpkgS;
-
-@interface GoTestpkgS : NSObject {
-}
-@property(strong, readonly) id ref;
-
-- (id)initWithRef:(id)ref;
-- (double)X;
-- (void)setX:(double)v;
-- (double)Y;
-- (void)setY:(double)v;
-- (double)Sum;
-@end
-
-FOUNDATION_EXPORT NSData* GoTestpkgBytesAppend(NSData* a, NSData* b);
-
-FOUNDATION_EXPORT void GoTestpkgCallI(GoTestpkgI* i, int32_t v);
-
-FOUNDATION_EXPORT double GoTestpkgCallSSum(GoTestpkgS* s);
-
-FOUNDATION_EXPORT int GoTestpkgCollectS(int want, int timeoutSec);
-
-FOUNDATION_EXPORT NSString* GoTestpkgHello(NSString* s);
-
-FOUNDATION_EXPORT void GoTestpkgHi();
-
-FOUNDATION_EXPORT void GoTestpkgInt(int32_t x);
-
-FOUNDATION_EXPORT GoTestpkgS* GoTestpkgNewS(double x, double y);
-
-FOUNDATION_EXPORT BOOL GoTestpkgReturnsError(BOOL b, NSString** ret0_, NSError** error);
-
-FOUNDATION_EXPORT int64_t GoTestpkgSum(int64_t x, int64_t y);
-
-#endif
diff --git a/bind/objc/testpkg/objc_testpkg/reference/GoTestpkg.m b/bind/objc/testpkg/objc_testpkg/reference/GoTestpkg.m
deleted file mode 100644
index dedf816..0000000
--- a/bind/objc/testpkg/objc_testpkg/reference/GoTestpkg.m
+++ /dev/null
@@ -1,249 +0,0 @@
-// Objective-C API for talking to golang.org/x/mobile/bind/objc/testpkg Go package.
-//   gobind -lang=objc golang.org/x/mobile/bind/objc/testpkg
-//
-// File is generated by gobind. Do not edit.
-
-#include "GoTestpkg.h"
-#include <Foundation/Foundation.h>
-#include "seq.h"
-
-static NSString *errDomain = @"go.golang.org/x/mobile/bind/objc/testpkg";
-
-#define _DESCRIPTOR_ "testpkg"
-
-#define _CALL_BytesAppend_ 1
-#define _CALL_CallI_ 2
-#define _CALL_CallSSum_ 3
-#define _CALL_CollectS_ 4
-#define _CALL_Hello_ 5
-#define _CALL_Hi_ 6
-#define _CALL_Int_ 7
-#define _CALL_NewS_ 8
-#define _CALL_ReturnsError_ 9
-#define _CALL_Sum_ 10
-
-#define _GO_testpkg_S_DESCRIPTOR_ "go.testpkg.S"
-#define _GO_testpkg_S_FIELD_X_GET_ (0x00f)
-#define _GO_testpkg_S_FIELD_X_SET_ (0x01f)
-#define _GO_testpkg_S_FIELD_Y_GET_ (0x10f)
-#define _GO_testpkg_S_FIELD_Y_SET_ (0x11f)
-#define _GO_testpkg_S_Sum_ (0x00c)
-
-#define _GO_testpkg_I_DESCRIPTOR_ "go.testpkg.I"
-#define _GO_testpkg_I_Fn_ 0x10a
-
-@implementation GoTestpkgI {
-}
-@synthesize delegate = _delegate;
-@synthesize ref = _ref;
-
-- (id)init {
-	self = [super init];
-	if (self) {
-		_delegate = self;
-		_ref = [GoSeqRef newForObject:self];
-	}
-	return self;
-}
-
-- (void)call:(int)code in:(void *)in out:(void *)out {
-	GoSeq* inseq = (GoSeq*)in;
-	GoSeq* outseq = (GoSeq*)out;
-	switch (code) {
-	case _GO_testpkg_I_Fn_:
-		{
-			int32_t v = go_seq_readInt32(inseq);
-			[_delegate Fn:v];
-			return;
-		}
-	default:
-	        NSLog(@"unknown code %s:%d", _GO_testpkg_I_DESCRIPTOR_, code);
-	}
-}
-
-@end
-
-@implementation GoTestpkgS {
-}
-
-- (id)initWithRef:(id)ref {
-	self = [super init];
-	if (self) { _ref = ref; }
-	return self;
-}
-
-- (double)X {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeRef(&in_, self.ref);
-	go_seq_send(_GO_testpkg_S_DESCRIPTOR_, _GO_testpkg_S_FIELD_X_GET_, &in_, &out_);
-	double ret_ = go_seq_readFloat64(&out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ret_;
-}
-
-- (void)setX:(double)v {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeRef(&in_, self.ref);
-	go_seq_writeFloat64(&in_, v);
-	go_seq_send(_GO_testpkg_S_DESCRIPTOR_, _GO_testpkg_S_FIELD_X_SET_, &in_, &out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-}
-
-- (double)Y {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeRef(&in_, self.ref);
-	go_seq_send(_GO_testpkg_S_DESCRIPTOR_, _GO_testpkg_S_FIELD_Y_GET_, &in_, &out_);
-	double ret_ = go_seq_readFloat64(&out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ret_;
-}
-
-- (void)setY:(double)v {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeRef(&in_, self.ref);
-	go_seq_writeFloat64(&in_, v);
-	go_seq_send(_GO_testpkg_S_DESCRIPTOR_, _GO_testpkg_S_FIELD_Y_SET_, &in_, &out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-}
-
-- (double)Sum {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeRef(&in_, self.ref);
-	go_seq_send(_GO_testpkg_S_DESCRIPTOR_, _GO_testpkg_S_Sum_, &in_, &out_);
-	double ret0_ = go_seq_readFloat64(&out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ret0_;
-}
-
-@end
-
-NSData* GoTestpkgBytesAppend(NSData* a, NSData* b) {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeByteArray(&in_, a);
-	go_seq_writeByteArray(&in_, b);
-	go_seq_send(_DESCRIPTOR_, _CALL_BytesAppend_, &in_, &out_);
-	NSData* ret0_ = go_seq_readByteArray(&out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ret0_;
-}
-
-void GoTestpkgCallI(GoTestpkgI* i, int32_t v) {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeRef(&in_, i.ref);
-	go_seq_writeInt32(&in_, v);
-	go_seq_send(_DESCRIPTOR_, _CALL_CallI_, &in_, &out_);
-	return;
-}
-
-double GoTestpkgCallSSum(GoTestpkgS* s) {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeRef(&in_, s.ref);
-	go_seq_send(_DESCRIPTOR_, _CALL_CallSSum_, &in_, &out_);
-	double ret0_ = go_seq_readFloat64(&out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ret0_;
-}
-
-int GoTestpkgCollectS(int want, int timeoutSec) {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeInt(&in_, want);
-	go_seq_writeInt(&in_, timeoutSec);
-	go_seq_send(_DESCRIPTOR_, _CALL_CollectS_, &in_, &out_);
-	int ret0_ = go_seq_readInt(&out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ret0_;
-}
-
-NSString* GoTestpkgHello(NSString* s) {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeUTF8(&in_, s);
-	go_seq_send(_DESCRIPTOR_, _CALL_Hello_, &in_, &out_);
-	NSString* ret0_ = go_seq_readUTF8(&out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ret0_;
-}
-
-void GoTestpkgHi() {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_send(_DESCRIPTOR_, _CALL_Hi_, &in_, &out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-}
-
-void GoTestpkgInt(int32_t x) {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeInt32(&in_, x);
-	go_seq_send(_DESCRIPTOR_, _CALL_Int_, &in_, &out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-}
-
-GoTestpkgS* GoTestpkgNewS(double x, double y) {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeFloat64(&in_, x);
-	go_seq_writeFloat64(&in_, y);
-	go_seq_send(_DESCRIPTOR_, _CALL_NewS_, &in_, &out_);
-	GoSeqRef* ret0__ref = go_seq_readRef(&out_);
-	GoTestpkgS* ret0_ = ret0__ref.obj;
-	if (ret0_ == NULL) {
-		ret0_ = [[GoTestpkgS alloc] initWithRef:ret0__ref];
-	}
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ret0_;
-}
-
-BOOL GoTestpkgReturnsError(BOOL b, NSString** ret0_, NSError** error) {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeBool(&in_, b);
-	go_seq_send(_DESCRIPTOR_, _CALL_ReturnsError_, &in_, &out_);
-	NSString* ret0__val = go_seq_readUTF8(&out_);
-	if (ret0_ != NULL) {
-		*ret0_ = ret0__val;
-	}
-	NSString* _error = go_seq_readUTF8(&out_);
-	if ([_error length] != 0 && error != nil) {
-		NSMutableDictionary *details = [NSMutableDictionary dictionary];
-		[details setValue:_error forKey:NSLocalizedDescriptionKey];
-		*error = [NSError errorWithDomain:errDomain code:1 userInfo:details];
-	}
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ([_error length] == 0);
-}
-
-int64_t GoTestpkgSum(int64_t x, int64_t y) {
-	GoSeq in_ = {};
-	GoSeq out_ = {};
-	go_seq_writeInt64(&in_, x);
-	go_seq_writeInt64(&in_, y);
-	go_seq_send(_DESCRIPTOR_, _CALL_Sum_, &in_, &out_);
-	int64_t ret0_ = go_seq_readInt64(&out_);
-	go_seq_free(&in_);
-	go_seq_free(&out_);
-	return ret0_;
-}
-