code: def tearDownClass(cls) -> None:
      ray.shutdown()
  
imports: import gymnasium
  import numpy
  import unittest
  import ray
  import math
  from ray.rllib.policy.sample_batch import SampleBatch
  from ray.rllib.policy.view_requirement import ViewRequirement
  from ray.rllib.utils.test_utils import check
  from ray.rllib.evaluation.collectors.agent_collector import AgentCollector
label_desc: Use image node_id 2 for calling the TestAgentCollector obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types