code: def stage_http_request(self, conn_id, version, url, target, method, headers,
                             payload):
          
          # pylint: disable=attribute-defined-outside-init
          self._http_request_version = version
          self._http_request_conn_id = conn_id
          self._http_request_url = url
          self._http_request_target = target
          self._http_request_method = method
          self._http_request_headers = headers
          self._http_request_payload = payload
docs: Set request HTTP information including url, headers, etc.