code: def produce(self, body, properties):
      # LOGGER.debug(f"produce body={body}, properties={properties}, mq={self}")
      self._get_or_create_channel()
      msg = osx_pb2.Message(
          head=bytes(json.dumps(properties), encoding="utf-8"),
          body=body,
      )
      inbound = osx_pb2.PushInbound(
          topic=self._send_topic, payload=msg.SerializeToString()
      )
      metadata = self.prepare_metadata()
  
      result = self._stub.push(inbound, metadata=metadata)
  
      return result
  
imports: import json
  import time
  from enum import Enum
  from logging import getLogger
  from typing import Dict, List, Any
  import grpc
  import numpy
  from fate.arch.federation.backends.osx import osx_pb2
  from fate.arch.federation.backends.osx.osx_pb2_grpc import PrivateTransferTransportStub
label_desc: Use image node_id 6 for calling the MQChannel obj's underlying member method code with example usage: obj.produce(body, properties) and returns: result