code: def undo_block_stop(self):
      pass
  
imports: from idlelib import format
  import unittest
  from unittest import mock
  from test.support import requires
  from tkinter import Tk, Text
  from idlelib.editor import EditorWindow
  from idlelib.idle_test.mock_idle import Editor
label_desc: Use image node_id 4 for calling the TextWrapper obj's underlying member method code with example usage: obj.undo_block_stop() without return types