code: def tearDown(self):
      self.text.delete("1.0", "end")
  
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 FormatRegionTest obj's underlying member method code with example usage: obj.tearDown() without return types