gboolean vik_aggregate_layer_is_empty ( VikAggregateLayer *val );
const GList *vik_aggregate_layer_get_children ( VikAggregateLayer *val );
-GList *vik_aggregate_layer_get_all_layers_of_type(VikAggregateLayer *val, GList *layers, gint type);
+GList *vik_aggregate_layer_get_all_layers_of_type(VikAggregateLayer *val, GList *layers, gint type, gboolean include_invisible);
#endif