class_docstr: GRPCServer
code: def stop(self):
      self._server.stop(None)
  
imports: import typing
  import inspect
  import traceback
  from concurrent import futures
  from towhee.utils.thirdparty.grpc_utils import grpc
  from .None import service_pb2
  from .None import service_pb2_grpc
  from towhee.serve.io import JSON, TEXT, BYTES, NDARRAY
  from towhee.serve.api_service import RouterConfig
  from towhee.utils.log import engine_log
label_desc: Use image node_id 5 for calling the GRPCServer obj's underlying member method code with example usage: obj.stop() without return types