code: def setUpClass(cls) -> None:
      ray.init()
  
file_path: ray/python/ray/rllib/policy/tests/test_rnn_sequencing.py
imports: import unittest
  import numpy
  import ray
  from ray.rllib.policy.rnn_sequencing import pad_batch_to_sequences_of_same_size, add_time_dimension, chop_into_sequences
  from ray.rllib.policy.sample_batch import SampleBatch
  from ray.rllib.policy.view_requirement import ViewRequirement
  from ray.rllib.utils.framework import try_import_tf, try_import_torch
  from ray.rllib.utils.test_utils import check
label_desc: Use image node_id 1 for calling the TestRNNSequencing obj's underlying member method code with example usage: obj.setUpClass(cls) without return types