code: def test_get_loader_handles_spec_attribute_none(self):
      name = "spam"
      mod = type(sys)(name)
      mod.__spec__ = None
      with CleanImport(name):
          sys.modules[name] = mod
          loader = pkgutil.get_loader(name)
      self.assertIsNone(loader)
  
imports: from pathlib import Path
  from test.support.import_helper import unload, CleanImport
  from test.support.warnings_helper import check_warnings, ignore_warnings
  import unittest
  import sys
  import importlib
  from importlib.util import spec_from_file_location
  import pkgutil
  import os
  import os.path
  import tempfile
  import shutil
  import zipfile
label_desc: Use image node_id 3 for calling the ImportlibMigrationTests obj's underlying member method code with example usage: obj.test_get_loader_handles_spec_attribute_none() without return types