code: def test_DirBrowserTreeItem(self):
      # Issue16226 - make sure that getting a sublist works
      d = PathBrowser.DirBrowserTreeItem("")
      d.GetSubList()
      self.assertEqual("", d.GetText())
  
      dir = os.path.split(os.path.abspath(idlelib.__file__))[0]
      self.assertEqual(d.ispackagedir(dir), True)
      self.assertEqual(d.ispackagedir(dir + "/Icons"), False)
  
file_path: catboost/contrib/tools/python/src/Lib/idlelib/idle_test/test_pathbrowser.py
imports: import unittest
  import os
  import sys
  import idlelib
  from idlelib import PathBrowser
label_desc: Use image node_id 1 for calling the PathBrowserTest obj's underlying member method code with example usage: obj.test_DirBrowserTreeItem() without return types