code: def test_model_sync_test():
      class TestClass(Model):
          TEST_CASES = SYNC_ASYNC_TEST_CASES
  
          def _predict(self, item, **_):
              return len(item)
  
      TestClass().test()
  
imports: import asyncio
  import os
  import pytest
  from modelkit.assets.errors import AssetDoesNotExistError, InvalidAssetSpecError
  from modelkit.core import errors
  from modelkit.core.library import ConfigurationNotFoundException, ModelLibrary, download_assets, load_model
  from modelkit.core.model import Asset, AsyncModel, Model
  from modelkit.core.model_configuration import ModelConfiguration, _configurations_from_objects, configure, list_assets
  from modelkit.core.settings import LibrarySettings
  from tests import TEST_DIR, testmodels
  from tests.assets.test_versioning import test_versioning
label_desc: Use image node_id 20 for calling a global function with example usage: test_model_sync_test() and returns: len