code: def __call__(
      self,
      user_message: UserDefinedMessage,
      grpc_context: RayServegRPCContext,  # to use grpc context, add this kwarg
  ) -> UserDefinedResponse:
      greeting = f"Hello {user_message.name} from {user_message.origin}"
      num, code, message = self.num_lookup(user_message.name)
  
      # Set custom code, details, and trailing metadata.
      grpc_context.set_code(code)
      grpc_context.set_details(message)
      grpc_context.set_trailing_metadata([("num", str(num))])
  
      user_response = UserDefinedResponse(
          greeting=greeting,
          num=num,
      )
      return user_response
  
imports: import ray
  from ray import serve
  from ray.serve.config import gRPCOptions
  import time
  from typing import Generator
  from user_defined_protos_pb2 import UserDefinedMessage, UserDefinedMessage2, UserDefinedResponse, UserDefinedResponse2
  import ray
  from ray import serve
  import grpc
  from user_defined_protos_pb2_grpc import UserDefinedServiceStub
  from user_defined_protos_pb2 import UserDefinedMessage
  import grpc
  from ray.serve.generated.serve_pb2_grpc import RayServeAPIServiceStub
  from ray.serve.generated.serve_pb2 import HealthzRequest, ListApplicationsRequest
  import grpc
  from user_defined_protos_pb2_grpc import UserDefinedServiceStub
  from user_defined_protos_pb2 import UserDefinedMessage2
  import grpc
  from user_defined_protos_pb2_grpc import UserDefinedServiceStub
  from user_defined_protos_pb2 import UserDefinedMessage
  import requests
  import torch
  from typing import List
  from PIL import Image
  from io import BytesIO
  from torchvision import transforms
  from user_defined_protos_pb2 import ImageClass, ImageData
  from ray import serve
  from ray.serve.handle import DeploymentHandle
  import grpc
  from user_defined_protos_pb2_grpc import ImageClassificationServiceStub
  from user_defined_protos_pb2 import ImageData
  import grpc
  from user_defined_protos_pb2_grpc import UserDefinedServiceStub
  from user_defined_protos_pb2 import UserDefinedMessage
  from user_defined_protos_pb2 import UserDefinedMessage, UserDefinedResponse
  from ray import serve
  from ray.serve.grpc_util import RayServegRPCContext
  import grpc
  from typing import Tuple
  import grpc
  from user_defined_protos_pb2_grpc import UserDefinedServiceStub
  from user_defined_protos_pb2 import UserDefinedMessage
label_desc: Use image node_id 3 for calling the GrpcDeployment obj's underlying member method code with example usage: obj.__call__(user_message, grpc_context) and returns: user_response