code: def test_init_close(self):
      instance = ft.FormatParagraph("editor")
      self.assertEqual(instance.editwin, "editor")
      instance.close()
      self.assertEqual(instance.editwin, None)
  
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 1 for calling the FormatClassTest obj's underlying member method code with example usage: obj.test_init_close() without return types