code: def test_from_pretrained_model_id_only(
      self, from_pretrained_mock: Mock
  ) -> None:
      model = DummyModel.from_pretrained("namespace/repo_name")
      from_pretrained_mock.assert_called_once()
      self.assertIs(model, from_pretrained_mock.return_value)
  
imports: import json
  import os
  import unittest
  from pathlib import Path
  from typing import TypeVar
  from unittest.mock import Mock, patch
  import pytest
  from huggingface_hub import HfApi, hf_hub_download
  from huggingface_hub.hub_mixin import PyTorchModelHubMixin
  from huggingface_hub.utils import SoftTemporaryDirectory, is_torch_available
  from .testing_constants import ENDPOINT_STAGING, TOKEN, USER
  from .testing_utils import repo_name
label_desc: Use image node_id 5 for calling the HubMixingTest obj's underlying member method code with example usage: obj.test_from_pretrained_model_id_only(from_pretrained_mock) without return types