public ObjectProperty<SVGPath> svgPathProperty() {
        if (null == svgPath) {
            svgPath = new ObjectPropertyBase<>() {
                @Override protected void invalidated() {
                    fireTileEvent(RESIZE_EVENT);
                }
                @Override public Object getBean() { return Tile.this; }
                @Override public String getName() { return "svgPath"; }
            };
        }
        return svgPath;
    }
Defines an optional node that can be used in combination with the
CustomTileSkin.
@param GRAPHIC
src/main/java/eu/hansolo/tilesfx/Tile.java