class AttributionTransformer extends DefaultTransformer implements DataRegistryListener<TileSetMetadata> {

    @Override
    public void allValuesRemoved(Object source)
    {
        List<LabelGeometry> removals = New.list(myGeometries.values());
        myGeometries.clear();
        publishGeometries(Collections.emptyList(), removals);
    }

    public  AttributionTransformer(DataRegistry dataRegistry, MapManager mapManager);

}