code: def _publish_response(self, slug, message):
          
  
          resp_topic = self.topics.gateway_topic(slug, 'data/response')
          self._logger.debug("Publishing response message: (topic=%s) (message=%s)", resp_topic, message)
          self.client.publish(resp_topic, message)
docs: Publish a response message for a device
  
          Args:
              slug (string): The device slug that we are publishing on behalf of
              message (dict): A set of key value pairs that are used to create the message
                  that is sent.