@Override protected void registerListeners() {
        super.registerListeners();
        tile.currentValueProperty().addListener(currentValueListener);
        tile.graphicProperty().addListener(graphicListener);
    }
Adopted from CircularProgressTileSkin originally Created by hansolo on 03.03.17.
Modified by Wolf Runnermann on 22.11.2022
src/main/java/eu/hansolo/tilesfx/skins/CircleProgressTileNumberSkin.java