code: def test_dummy_servicer_can_take_any_methods():
      """Test an instance of DummyServicer can be called with any method name without
      error.
  
      When dummy_servicer is called with any custom defined methods, it won't raise error.
      """
      dummy_servicer = DummyServicer()
      dummy_servicer.foo
      dummy_servicer.bar
      dummy_servicer.baz
      dummy_servicer.my_method
      dummy_servicer.Predict
  
file_path: ray/python/ray/serve/tests/unit/test_grpc_util.py
imports: import pickle
  from typing import Callable
  import grpc
  import pytest
  from google.protobuf.any_pb2 import Any
  from ray import cloudpickle
  from ray.serve._private.grpc_util import DummyServicer, create_serve_grpc_server, gRPCServer
  from ray.serve._private.test_utils import FakeGrpcContext
  from ray.serve.grpc_util import RayServegRPCContext
label_desc: Use image node_id 2 for calling a global function with example usage: test_dummy_servicer_can_take_any_methods() without return types