code: def test_is_dir(self):
      self.assertEqual(MultiplexedPath(self.folder).is_dir(), True)
  
imports: import os.path
  import sys
  import pathlib
  import unittest
  from importlib import import_module
  from importlib.readers import MultiplexedPath, NamespaceReader
label_desc: Use image node_id 6 for calling the MultiplexedPathTest obj's underlying member method code with example usage: obj.test_is_dir() without return types