code: def test_get_original_class(self):
      origin_class = Actor1._original
      origin_actor = origin_class(10)
  
      self.assertEqual(origin_actor.arg, 10)
      self.assertEqual(origin_actor.add_one(1), 2)
  
imports: import random
  import unittest
  import parl
  import numpy
  from parl.remote.client import disconnect
  from parl.utils import logger, get_free_tcp_port
  from parl.remote.master import Master
  from parl.remote.worker import Worker
  import time
  import threading
  import random
  from parl.utils.test_utils import XparlTestCase
label_desc: Use image node_id 4 for calling the Test_proxy_wrapper obj's underlying member method code with example usage: obj.test_get_original_class() without return types