text: //
  // Copyright (c) 2016-present, Facebook, Inc.
  // All rights reserved.
  //
  // This source code is licensed under the BSD-style license found in the
  // LICENSE file in the root directory of this source tree. An additional grant
  // of patent rights can be found in the PATENTS file in the same directory.
  //
  
  #import <Foundation/Foundation.h>
  
  typedef NS_ENUM(NSInteger, SROpCode)
  {
      SROpCodeTextFrame = 0x1,
      SROpCodeBinaryFrame = 0x2,
      // 3-7 reserved.
      SROpCodeConnectionClose = 0x8,
      SROpCodePing = 0x9,
      SROpCodePong = 0xA,
      // B-F reserved.
  };
  
  /**
   Default buffer size that is used for reading/writing to streams.
   */
  extern size_t SRDefaultBufferSize(void);
  
  