code: def test_get_loader_None_in_sys_modules(self):
      name = "totally bogus"
      sys.modules[name] = None
      try:
          loader = pkgutil.get_loader(name)
      finally:
          del sys.modules[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 4 for calling the ImportlibMigrationTests obj's underlying member method code with example usage: obj.test_get_loader_None_in_sys_modules() without return types