code: private void readStreamCancel(InH3 hIn, HeadersAmp headers)
      throws IOException
    {
      ServiceRefAmp serviceRef = readToAddress(hIn);
      
      GatewayReply from = readFromAddress(hIn);
  
      long qid = hIn.readLong();
  
      if (log.isLoggable(_logLevel)) {
        log.log(_logLevel, "stream-cancel-r " + from + "," + qid + " (in " + this + ")"
                 + "\n  {id:" + qid + ", to:" + serviceRef + "," + headers + "}");
      }
      
      from.streamCancel(qid);
    }
docs: The stream result message is a partial or final result from the target's
  stream.