code: def bell(self):
      self._bell = True
  
imports: import unittest
  from test.test_support import requires
  import Tkinter
  from Tkinter import Text
  from idlelib.idle_test.mock_tk import Text
  from idlelib.IdleHistory import History
  from idlelib.configHandler import idleConf
label_desc: Use image node_id 3 for calling the TextWrapper obj's underlying member method code with example usage: obj.bell() without return types