code: def set_client_id(client_id):
      FLClient.client_id = client_id
  
file_path: BigDL/python/ppml/src/bigdl/ppml/fl/nn/fl_client.py
imports: import logging
  import grpc
  from bigdl.ppml.fl.nn.generated.nn_service_pb2 import TrainRequest, PredictRequest, UploadMetaRequest
  from bigdl.ppml.fl.nn.generated.nn_service_pb2_grpc import *
  import yaml
  import threading
  from bigdl.dllib.utils.log4Error import invalidInputError
label_desc: Use image node_id 1 for calling the FLClient obj's underlying member method code with example usage: obj.set_client_id(client_id) without return types