code: def test_import_user_module_from_file(self):
      self.assertIsNone(registry.get_builder_class("always_one"))
      self.assertIsNone(registry.get_model_class("simple"))
  
      user_dir = self._get_user_dir()
      user_file = os.path.join(user_dir, "models", "simple.py")
      import_user_module(user_file)
      # Only model should be found and build should be none
      self.assertIsNone(registry.get_builder_class("always_one"))
      self.assertIsNotNone(registry.get_model_class("simple"))
      self.assertTrue("mmf_user_dir" in sys.modules)
      self.assertTrue(user_dir in get_mmf_env("user_dir"))
  
imports: import contextlib
  import io
  import os
  import sys
  import unittest
  from mmf.common.registry import registry
  from mmf.utils.configuration import get_mmf_env
  from mmf.utils.env import import_user_module, setup_imports
  from mmf.utils.general import get_mmf_root
  from mmf_cli.run import run
  from tests.test_utils import make_temp_dir, search_log
label_desc: Use image node_id 11 for calling the TestUtilsEnvE2E obj's underlying member method code with example usage: obj.test_import_user_module_from_file() without return types