code: def get_handle_for_endpoint(self, *args, **kwargs):
      if (
          self.route is None
          and self.handle is None
          and self.app_is_cross_language is None
      ):
          return None
  
      return self.route, self.handle, self.app_is_cross_language
  
imports: import asyncio
  import pickle
  import sys
  from typing import Dict
  from unittest.mock import AsyncMock
  import grpc
  import pytest
  import ray
  from ray import serve
  from ray.actor import ActorHandle
  from ray.serve._private.common import DeploymentID, EndpointInfo, EndpointTag
  from ray.serve._private.constants import DEFAULT_UVICORN_KEEP_ALIVE_TIMEOUT_S, SERVE_NAMESPACE
  from ray.serve._private.proxy import DRAINED_MESSAGE, HEALTH_CHECK_SUCCESS_MESSAGE, HTTPProxy, ResponseStatus, gRPCProxy
  from ray.serve._private.proxy_request_response import ProxyRequest
  from ray.serve._private.proxy_router import ProxyRouter
  from ray.serve._private.test_utils import FakeGrpcContext
  from ray.serve.generated import serve_pb2
  from ray.serve.grpc_util import RayServegRPCContext
label_desc: Use image node_id 3 for calling the FakeProxyRouter obj's underlying member method code with example usage: obj.get_handle_for_endpoint() and returns: self,  self,  self, None