code: def test_close(self):
      redir = WidgetRedirector(self.text)
      redir.register("insert", Func)
      redir.close()
      self.assertEqual(redir._operations, {})
      self.assertFalse(hasattr(self.text, "widget"))
  
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 4 for calling the InitCloseTest obj's underlying member method code with example usage: obj.test_close() without return types