public static PointSettings GetPointSettings(this AssociationSourceEndVisualSettingsModel model)
        {
            var stereotype = model.GetStereotype("Point Settings");

            return(stereotype != null ? new PointSettings(stereotype) : null);
        }
        public static NavigableIndicatorSettings GetNavigableIndicatorSettings(this AssociationSourceEndVisualSettingsModel model)
        {
            var stereotype = model.GetStereotype("Navigable Indicator Settings");

            return(stereotype != null ? new NavigableIndicatorSettings(stereotype) : null);
        }