code: def set_port(self, port):
      self.port = port
  
file_path: BigDL/python/ppml/src/bigdl/ppml/fl/nn/fl_server.py
imports: from concurrent import futures
  import grpc
  from bigdl.ppml.fl import *
  from bigdl.ppml.fl.nn.nn_service import NNServiceImpl
  import yaml
  import click
  from bigdl.ppml.fl.psi.psi_service import PSIServiceImpl
  from bigdl.ppml.fl.nn.generated.nn_service_pb2_grpc import *
  from bigdl.ppml.fl.nn.generated.psi_service_pb2_grpc import *
label_desc: Use image node_id 2 for calling the FLServer obj's underlying member method code with example usage: obj.set_port(port) without return types