code: def test_update_model_version(mock_store):
      name = "Model 1"
      version = "12"
      description = "new description"
      expected_result = ModelVersion(
          name, version, creation_timestamp=123, description=description
      )
      mock_store.update_model_version.return_value = expected_result
      actal_result = newModelRegistryClient().update_model_version(
          name, version, "new description"
      )
      mock_store.update_model_version.assert_called_once_with(
          name=name, version=version, description="new description"
      )
      assert expected_result == actal_result
  
imports: from unittest import mock
  from unittest.mock import ANY
  import pytest
  from mlflow.entities.model_registry import ModelVersion, ModelVersionTag, RegisteredModel, RegisteredModelTag
  from mlflow.exceptions import MlflowException
  from mlflow.store.entities.paged_list import PagedList
  from mlflow.store.model_registry import SEARCH_MODEL_VERSION_MAX_RESULTS_DEFAULT, SEARCH_REGISTERED_MODEL_MAX_RESULTS_DEFAULT
  from mlflow.store.model_registry.sqlalchemy_store import SqlAlchemyStore
  from mlflow.tracking._model_registry.client import ModelRegistryClient
label_desc: Use image node_id 18 for calling a global function with example usage: test_update_model_version(mock_store) without return types