code: def setUpClass(cls) -> None:
      ray.init()
  
file_path: ray/rllib/policy/tests/test_policy_map.py
imports: import gymnasium
  import numpy
  import time
  import unittest
  import ray
  from ray.rllib.algorithms.ppo import PPOConfig, PPOTF2Policy
  from ray.rllib.policy.policy_map import PolicyMap
  from ray.rllib.utils.test_utils import check
  from ray.rllib.utils.tf_utils import get_tf_eager_cls_if_necessary
label_desc: Use image node_id 1 for calling the TestPolicyMap obj's underlying member method code with example usage: obj.setUpClass(cls) without return types