async def METHOD_NAME(store):
    """Mock version of load."""
    if store._data is None:
        # No data to load
        if store.key not in data:
            return None
        mock_data = data.get(store.key)
        if "data" not in mock_data or "version" not in mock_data:
            _LOGGER.error('Mock data needs "version" and "data"')
            raise ValueError('Mock data needs "version" and "data"')
        store._data = mock_data
    # Route through original load so that we trigger migration
    loaded = await orig_load(store)
    _LOGGER.info("Loading data for %s: %s", store.key, loaded)
    return loaded