code: def setUpClass(cls):
      requires("gui")
      cls.root = Tk()
      cls.root.withdraw()
      cls.pb = pathbrowser.PathBrowser(cls.root, _utest=True)
  
imports: from idlelib import pathbrowser
  import unittest
  from test.support import requires
  from tkinter import Tk
  import os.path
  import pyclbr
  import sys
  from idlelib.idle_test.mock_idle import Func
  import idlelib
  from idlelib import browser
  from idlelib.tree import TreeNode
label_desc: Use image node_id 1 for calling the PathBrowserTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types