code: def _get_channel(
      self,
      topic_pair,
      src_party_id,
      src_role,
      dst_party_id,
      dst_role,
      mq=None,
      conf: dict = None,
  ):
      raise NotImplementedError()
  
imports: import json
  import logging
  import sys
  import typing
  from typing import List
  from fate.arch.computing.api import KVTableContext
  from fate.arch.federation.api import Federation, PartyMeta, TableMeta
  from ._datastream import Datastream
  from ._parties import Party
label_desc: Use image node_id 2 for calling the MessageQueueBasedFederation obj's underlying member method code with example usage: obj._get_channel(topic_pair, src_party_id, src_role, dst_party_id, dst_role, mq, conf) without return types