code: def setUp(self) -> None:
      ray.init(num_cpus=4)
  
imports: import numpy
  import pickle
  import unittest
  import ray
  from ray.rllib.algorithms.ppo import PPOConfig
  from ray.rllib.examples.env.debug_counter_env import DebugCounterEnv
  from ray.rllib.examples.models.rnn_spy_model import RNNSpyModel
  from ray.rllib.models import ModelCatalog
  from ray.rllib.policy.rnn_sequencing import chop_into_sequences
  from ray.rllib.policy.sample_batch import SampleBatch
  from ray.rllib.utils.test_utils import check
  from ray.tune.registry import register_env
label_desc: Use image node_id 1 for calling the TestRNNSequencing obj's underlying member method code with example usage: obj.setUp() without return types