code: def test_dispatch_bypass(self):
      self.orig_insert("insert", "asdf")
      # tk.call returns '' where Python would return None
      self.assertEqual(self.redir.dispatch("delete", "1.0", "end"), "")
      self.assertEqual(self.text.get("1.0", "end"), "\n")
  
imports: from idlelib.redirector import WidgetRedirector
  import unittest
  from test.support import requires
  from tkinter import Tk, Text, TclError
  from idlelib.idle_test.mock_idle import Func
label_desc: Use image node_id 11 for calling the WidgetRedirectorTest obj's underlying member method code with example usage: obj.test_dispatch_bypass() without return types