code: def setUpClass(cls) -> None:
      ray.init()
  
file_path: ray/rllib/offline/tests/test_json_reader.py
imports: import os
  import unittest
  from pathlib import Path
  import ray
  from ray.rllib.algorithms.algorithm_config import AlgorithmConfig
  from ray.rllib.offline import IOContext
  from ray.rllib.offline.json_reader import JsonReader
label_desc: Use image node_id 1 for calling the TestJsonReader obj's underlying member method code with example usage: obj.setUpClass(cls) without return types