code: def setUpClass(cls) -> None:
      ray.init()
  
file_path: ray/rllib_contrib/alpha_zero/tests/test_alpha_zero.py
imports: import unittest
  import rllib_alpha_zero.alpha_zero
  from rllib_alpha_zero.alpha_zero.custom_torch_models import DenseModel
  import ray
  from ray.rllib.examples.env.cartpole_sparse_rewards import CartPoleSparseRewards
  from ray.rllib.utils.test_utils import check_train_results, framework_iterator
label_desc: Use image node_id 1 for calling the TestAlphaZero obj's underlying member method code with example usage: obj.setUpClass(cls) without return types