code: def dont_insert(self, index, chars, tags=None):
      pass
  
imports: from idlelib.percolator import Percolator, Delegator
  import unittest
  from test.support import requires
  from tkinter import Text, Tk, END
label_desc: Use image node_id 6 for calling the MyFilter obj's underlying member method code with example usage: obj.dont_insert(index, chars, tags) without return types