code: def setup_class(cls):
      cls.parser = cli_parser.get_parser()
  
imports: from __future__ import annotations
  import contextlib
  from io import StringIO
  from unittest import mock
  import pytest
  from airflow.cli import cli_parser
  from airflow.cli.commands import config_command
  from tests.test_utils.config import conf_vars
label_desc: Use image node_id 1 for calling the TestCliConfigList obj's underlying member method code with example usage: obj.setup_class(cls) without return types