code: def _send_request(self, request, headers=None, content=None, **operation_config):
          
          if (TRACE_ENV_VAR in os.environ and os.environ[TRACE_ENV_VAR] == 'true')\
                  or (TRACE_ENV_VAR_COMPAT in os.environ and os.environ[TRACE_ENV_VAR_COMPAT] == 'true'):
              print(request.method + ' ' + request.url)
          logger.debug('%s %s', request.method, request.url)
          logger.debug('Request content: %s', content)
          response = self._client.send(request=request, headers=headers,
                                       content=content, **operation_config)
          logger.debug('Response content: %s', response.content)
          if response.status_code < 200 or response.status_code >= 300:
              self._handle_error(request, response)
          return response
docs: Prepare and send request object according to configuration.
          :param ClientRequest request: The request object to be sent.
          :param dict headers: Any headers to add to the request.
          :param content: Any body data to add to the request.
          :param config: Any specific config overrides