code: def setUpClass(cls):
      name_dialog_module.tkMessageBox = Mbox
  
file_path: catboost/contrib/tools/python/src/Lib/idlelib/idle_test/test_config_name.py
imports: import unittest
  from idlelib.idle_test.mock_tk import Var, Mbox
  from idlelib import configSectionNameDialog
label_desc: Use image node_id 1 for calling the ConfigNameTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types