code: def test_serve_start_dictionary_grpc_options(ray_cluster):
      """Test serve able to start with dictionary grpc_options.
  
      When Serve starts with dictionary grpc_options, it should not throw errors and able
      to serve health check and list applications gRPC requests.
      """
      cluster = ray_cluster
      cluster.add_node(num_cpus=2)
      cluster.connect(namespace=SERVE_NAMESPACE)
  
      grpc_port = 9000
      grpc_servicer_functions = [
          "ray.serve.generated.serve_pb2_grpc.add_UserDefinedServiceServicer_to_server",
          "ray.serve.generated.serve_pb2_grpc.add_FruitServiceServicer_to_server",
      ]
  
      serve.start(
          grpc_options={
              "port": grpc_port,
              "grpc_servicer_functions": grpc_servicer_functions,
          },
      )
  
      channel = grpc.insecure_channel("localhost:9000")
  
      # Ensures ListApplications method succeeding.
      ping_grpc_list_applications(channel, [])
  
      # Ensures Healthz method succeeding.
      ping_grpc_healthz(channel)
  
imports: import os
  import sys
  from typing import Any
  import grpc
  import pytest
  import ray
  from ray import serve
  from ray._private.test_utils import SignalActor, wait_for_condition
  from ray.cluster_utils import Cluster
  from ray.serve._private.common import DeploymentID
  from ray.serve._private.constants import SERVE_NAMESPACE
  from ray.serve._private.test_utils import ping_fruit_stand, ping_grpc_another_method, ping_grpc_call_method, ping_grpc_healthz, ping_grpc_list_applications, ping_grpc_model_multiplexing, ping_grpc_streaming, send_signal_on_cancellation
  from ray.serve.config import gRPCOptions
  from ray.serve.generated import serve_pb2, serve_pb2_grpc
  from ray.serve.grpc_util import RayServegRPCContext
  from ray.serve.tests.test_config_files.grpc_deployment import g, g2
label_desc: Use image node_id 2 for calling a global function with example usage: test_serve_start_dictionary_grpc_options(ray_cluster) without return types