code: def get_arg1_after_sleep(self, sleep_seconds):
      time.sleep(sleep_seconds)
      return self.arg1
  
file_path: PARL/parl/remote/future_mode/tests/future_object_test.py
imports: import unittest
  import parl
  import time
  import threading
  from parl.remote import exceptions
  from parl.remote.future_mode import FutureObject
  from parl.utils.test_utils import XparlTestCase
label_desc: Use image node_id 4 for calling the Actor obj's underlying member method code with example usage: obj.get_arg1_after_sleep(sleep_seconds) and returns: self