code: def testCallbackSetupBackwardsCompatible(self, mocked_warning_method):
      class NoExperimentInSetupCallback(Callback):
          # Old method definition didn't take in **experiment.public_spec
          def setup(self):
              return
  
      callback = NoExperimentInSetupCallback()
      trial_runner = TrialRunner(callbacks=[callback])
      trial_runner.setup_experiments(
          experiments=[Experiment("", lambda x: x)], total_num_samples=1
      )
      mocked_warning_method.assert_called_once()
      self.assertIn(
          "Please update", mocked_warning_method.call_args_list[0][0][0]
      )
  
imports: import os
  import shutil
  import sys
  import tempfile
  import time
  import unittest
  from unittest.mock import patch
  from collections import OrderedDict
  import ray
  from ray import tune
  from ray.air._internal.checkpoint_manager import _TrackedCheckpoint, CheckpointStorage
  from ray.air.constants import TRAINING_ITERATION
  from ray.rllib import _register_all
  from ray.tune.execution.ray_trial_executor import _ExecutorEvent, _ExecutorEventType, RayTrialExecutor
  from ray.tune.callback import warnings
  from ray.tune.experiment import Trial
  from ray.tune.execution.trial_runner import TrialRunner
  from ray.tune import Callback
  from ray.tune.experiment import Experiment
label_desc: Use image node_id 5 for calling the TrialRunnerCallbacks obj's underlying member method code with example usage: obj.testCallbackSetupBackwardsCompatible(mocked_warning_method) without return types