code: def tearDownClass(cls):
      cls.root.destroy()
      del cls.root
  
file_path: cpython/Lib/idlelib/idle_test/test_tree.py
imports: from idlelib import tree
  import unittest
  from test.support import requires
  from tkinter import Tk, EventType, SCROLL
label_desc: Use image node_id 2 for calling the TreeTest obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types