code: def add_one(self, value):
      value += 1
      return value
  
imports: import unittest
  import parl
  from parl.remote.master import Master
  from parl.remote.worker import Worker
  from parl.remote.client import disconnect
  from parl.utils import logger, _IS_WINDOWS
  import os
  import threading
  import time
  import subprocess
  from parl.utils import get_free_tcp_port
label_desc: Use image node_id 6 for calling the Actor obj's underlying member method code with example usage: obj.add_one(value) and returns: value