code: def cleanup(self):
      LOGGER.debug(f"cancel channel")
      self._get_or_create_channel()
      inbound = osx_pb2.ReleaseInbound()
      metadata = self.prepare_metadata()
  
      result = self._stub.release(inbound, metadata=metadata)
  
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 8 for calling the MQChannel obj's underlying member method code with example usage: obj.cleanup() without return types