增加换肤功能

Pods/Protobuf/objectivec/GPBExtensionInternals.h

@@ -0,0 +1,18 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#import <Foundation/Foundation.h>
+
+#import "GPBCodedOutputStream.h"
+#import "GPBDescriptor.h"
+
+size_t GPBComputeExtensionSerializedSizeIncludingTag(
+    GPBExtensionDescriptor *extension, id value);
+
+void GPBWriteExtensionValueToOutputStream(GPBExtensionDescriptor *extension,
+                                          id value,
+                                          GPBCodedOutputStream *output);