code: def format(self, record: logging.LogRecord):
      log_msg = super().format(record)
      return "MyCustom message: hello " + log_msg
  
imports: import importlib
  import logging
  import os
  import sys
  import pytest
  import requests
  import starlette
  from starlette.middleware import Middleware
  import ray
  from ray import serve
  from ray._private.test_utils import wait_for_condition
  from ray.exceptions import RayActorError
  from ray.serve._private.common import ProxyStatus
  from ray.serve._private.utils import call_function_from_import_path
  from ray.serve.context import _get_global_client
  from ray.serve.schema import LoggingConfig, ServeInstanceDetails
label_desc: Use image node_id 1 for calling the MyServeFormatter obj's underlying member method code with example usage: obj.format(record) and returns: unknown