anchor.diff:      _remainingMaskingKeyBytes = null;
       _remainingPayloadBytes = null;
       _unmaskingIndex = 0;
  +    _controlPayload = null;
     }
   
     void _reportError(e) {
  
positive.code:   static final int NONE = 0;
    static final int BINARY = 1;
    static final int TEXT = 2;
    static final int CLOSE = 3;
  }
  
  
  
negative.code:     _socket.close();
    }
  
    _sendFrame(int opcode, [List<int> data]) {
      bool mask = false;  // Masking not implemented for server.
      int dataLength = data == null ? 0 : data.length;
      // Determine the header size.
  