code: def test_is_dir(self):
      package = util.create_package(
          file=data01,
          path=data01.__file__,
          contents=["A", "B", "C", "D/E", "D/F"],
      )
      self.assertTrue(resources.files(package).joinpath("D").is_dir())
  
imports: import contextlib
  import sys
  import unittest
  import uuid
  import pathlib
  from .None import data01
  from .None import zipdata01, zipdata02
  from .None import util
  from importlib import resources, import_module
  from test.support import import_helper, os_helper
  from test.support.os_helper import unlink
label_desc: Use image node_id 3 for calling the ResourceLoaderTests obj's underlying member method code with example usage: obj.test_is_dir() without return types