code: def tearDown(cls) -> None:
      ray.shutdown()
  
file_path: ray/python/ray/rllib/core/learner/torch/tests/test_torch_learner_compile.py
imports: import itertools
  import unittest
  import gymnasium
  import ray
  from ray.rllib.algorithms.algorithm_config import TorchCompileWhatToCompile
  from ray.rllib.core.testing.testing_learner import BaseTestingAlgorithmConfig
  from ray.rllib.policy.sample_batch import MultiAgentBatch
  from ray.rllib.utils.test_utils import get_cartpole_dataset_reader
  from ray.rllib.utils.torch_utils import _dynamo_is_available
label_desc: Use image node_id 2 for calling the TestLearner obj's underlying member method code with example usage: obj.tearDown(cls) without return types