| // 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); |