code: def start(self):
      self._start_time = datetime.datetime.now()
  
imports: import datetime
  from multiprocessing import Process
  from typing import Optional
  import aim.ext.transport.proto.remote_tracking_pb2
  import aim.ext.transport.proto.remote_tracking_pb2_grpc
  from aim.ext.cleanup import AutoClean
label_desc: Use image node_id 2 for calling the LocalWorker obj's underlying member method code with example usage: obj.start() without return types