code: def setUpClass(cls):
      cls.klass = cls.module.ZoneInfo
      super().setUpClass()
  
file_path: cpython/Lib/test/test_zoneinfo/_support.py
imports: import contextlib
  import functools
  import sys
  import threading
  import unittest
  from test.support.import_helper import import_fresh_module
label_desc: Use image node_id 1 for calling the ZoneInfoTestBase obj's underlying member method code with example usage: obj.setUpClass(cls) without return types