code: def produce(self, body, properties: dict):
      self._get_channel()
      LOGGER.debug(f"send queue: {self._send_queue_name}")
  
      if "headers" in properties:
          headers = json.loads(properties["headers"])
      else:
          headers = {}
  
      properties = pika.BasicProperties(
          content_type=properties["content_type"],
          app_id=properties["app_id"],
          message_id=properties["message_id"],
          correlation_id=properties["correlation_id"],
          headers=headers,
          delivery_mode=1,
      )
  
      return self._channel.basic_publish(
          exchange="",
          routing_key=self._send_queue_name,
          body=body,
          properties=properties,
      )
  
file_path: FATE/python/fate/arch/federation/backends/rabbitmq/_mq_channel.py
imports: import json
  import logging
  import pika
  from fate.arch.federation.message_queue import nretry
label_desc: Use image node_id 4 for calling the MQChannel obj's underlying member method code with example usage: obj.produce(body, properties) and returns: self