code: def test_transition_model_version_stage_validation_errors(mock_store):
      # pylint: disable=unused-argument
      with pytest.raises(
          MlflowException, match="The stage must not be an empty string"
      ):
          newModelRegistryClient().transition_model_version_stage(
              "Model 1", "12", stage=" "
          )
  
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 20 for calling a global function with example usage: test_transition_model_version_stage_validation_errors(mock_store) without return types