code: func parseStopSendingFrame(r *bytes.Reader, _ protocol.VersionNumber) (*StopSendingFrame, error) {
  	if _, err := r.ReadByte(); err != nil {
  		return nil, err
  	}
  
  	streamID, err := utils.ReadVarInt(r)
  	if err != nil {
  		return nil, err
  	}
  	errorCode, err := utils.BigEndian.ReadUint16(r)
  	if err != nil {
  		return nil, err
  	}
  
  	return &StopSendingFrame{
  		StreamID:  protocol.StreamID(streamID),
  		ErrorCode: protocol.ApplicationErrorCode(errorCode),
  	}, nil
  }
docs: // parseStopSendingFrame parses a STOP_SENDING frame