code: def setup_method(self):
      self.old_modules = dict(sys.modules)
  
imports: from __future__ import annotations
  import os
  import sys
  import tempfile
  from unittest import mock
  from unittest.mock import MagicMock, call, patch
  import pytest
  from airflow.exceptions import AirflowClusterPolicyViolation, AirflowConfigException
  from tests.test_utils.config import conf_vars
label_desc: Use image node_id 1 for calling the TestLocalSettings obj's underlying member method code with example usage: obj.setup_method() without return types