code: def test_actor_mro(ray_start_regular_shared):
      @ray.remote
      class Foo:
          def __init__(self, x):
              self.x = x
  
          @classmethod
          def factory_f(cls, x):
              return cls(x)
  
          def get_x(self):
              return self.x
  
      obj = Foo.factory_f(1)
      assert obj.get_x() == 1
  
imports: import datetime
  import os
  import random
  import sys
  import tempfile
  import numpy
  import pytest
  import ray
  from ray import cloudpickle
  from ray._private import ray_constants
  from ray._private.test_utils import client_test_enabled, wait_for_condition, wait_for_pid_to_exit
  from ray.actor import ActorClassInheritanceException
  from ray.tests.client_test_utils import create_remote_signal_actor
  from ray._private.test_utils import SignalActor
  import setproctitle
label_desc: Use image node_id 45 for calling a global function with example usage: test_actor_mro(ray_start_regular_shared) and returns: cls, self