code: def tearDownClass(cls) -> None:
      ray.shutdown()
  
file_path: ray/rllib_contrib/es/tests/test_es.py
imports: import unittest
  import numpy
  import rllib_es.es.es
  import ray
  from ray.rllib.utils.test_utils import check_compute_single_action, framework_iterator
label_desc: Use image node_id 2 for calling the TestES obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types