code: public void init(HttpInboundConnection conn, RequestMessage req) {
          this.request = req;
          this.response = conn.getResponse();
          this.connection = conn;
          this.outStream = new ResponseBody(this.response.getBody());
          this.locale = Locale.getDefault();
      }
docs: Initialize this response message with the input connection.
  
  @param conn
  @param req