code: def _get_handler_controller(self):
      return integration_controller
  
imports: import json
  import pickle
  import traceback
  from concurrent import futures
  import grpc
  from mindsdb.microservices_grpc.ml import ml_pb2_grpc
  from mindsdb.microservices_grpc.ml import ml_pb2, common_pb2
  from mindsdb.interfaces.storage.model_fs import ModelStorage, HandlerStorage
  from mindsdb.integrations.libs.response import RESPONSE_TYPE
  from mindsdb.interfaces.database.integrations import integration_controller
  from mindsdb.integrations.libs.handler_helpers import get_handler
  from mindsdb.utilities.context import context
  from mindsdb.utilities import log
label_desc: Use image node_id 3 for calling the MLServiceServicer obj's underlying member method code with example usage: obj._get_handler_controller() and returns: integration_controller