code: def tearDownClass(cls):
      ray.shutdown()
  
file_path: ray/rllib_contrib/maml/tests/test_maml.py
imports: import unittest
  from gymnasium.wrappers import TimeLimit
  from rllib_maml.envs.cartpole_mass import CartPoleMassEnv
  from rllib_maml.envs.pendulum_mass import PendulumMassEnv
  from rllib_maml.maml import MAMLConfig
  import ray
  from ray.rllib.utils.test_utils import check_compute_single_action, check_train_results, framework_iterator
  from ray.tune.registry import register_env
label_desc: Use image node_id 2 for calling the TestMAML obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types