GtkWidget *vik_routing_ui_selector_new ( Predicate func, gpointer user_data );
VikRoutingEngine *vik_routing_ui_selector_get_nth ( GtkWidget *combo, int pos );
GtkWidget *vik_routing_ui_selector_new ( Predicate func, gpointer user_data );
VikRoutingEngine *vik_routing_ui_selector_get_nth ( GtkWidget *combo, int pos );