def check_start_state(project, materialized_view):
        """
        Check the starting state; this should align with `files.MY_MATERIALIZED_VIEW`.
        """
        raise NotImplementedError(
            "To use this test, please implement `check_start_state`,"
            " inherited from `MaterializedViewsChanges`."
        )

        Check the starting state; this should align with `files.MY_MATERIALIZED_VIEW`.
        
tests/functional/adapter/materialized_view/changes.py