code: def tearDownClass(cls):
      cls.root.destroy()
      del cls.root
  
imports: import unittest
  from test.test_support import requires
  from Tkinter import Tk, Toplevel, Frame
  from idlelib import SearchEngine
  from idlelib import SearchDialogBase
  from idlelib.idle_test.mock_idle import Func
label_desc: Use image node_id 2 for calling the SearchDialogBaseTest obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types