code: def create_placement_group_factory(self):
      self.placement_group_factory = (
          self._default_placement_group_factory
      )
  
imports: import os
  import uuid
  from typing import Any, Callable, Dict, Optional, Tuple, Type, Union
  import ray
  from ray.air.execution import FixedResourceManager
  from ray.air.execution._internal import RayActorManager
  from ray.air.execution.resources import ResourceManager, ResourceRequest
  from ray.air.execution._internal.tracked_actor import TrackedActor
  from ray.tune.execution.tune_controller import TuneController
  from ray.tune.experiment import Trial
  from ray.tune.utils.resource_updater import _ResourceUpdater
  from ray.train.tests.util import mock_storage_context
label_desc: Use image node_id 3 for calling the TestingTrial obj's underlying member method code with example usage: obj.create_placement_group_factory() without return types