code: def arg1(self, x, y):
      time.sleep(0.2)
      return x + y
  
file_path: PARL/parl/remote/tests/get_set_attribute_notebook_test.py
imports: import unittest
  import parl
  import numpy
  import time
  import threading
  import random
  from parl.utils import logger
  from unittest import mock
  from parl.utils.test_utils import XparlTestCase
label_desc: Use image node_id 2 for calling the Actor obj's underlying member method code with example usage: obj.arg1(x, y) and returns: unknown