public BooleanProperty thresholdVisibleProperty() {
        if (null == thresholdVisible) {
            thresholdVisible = new BooleanPropertyBase(_thresholdVisible) {
                @Override protected void invalidated() { fireTileEvent(VISIBILITY_EVENT); }
                @Override public Object getBean() { return Tile.this; }
                @Override public String getName() { return "thresholdVisible"; }
            };
        }
        return thresholdVisible;
    }
Defines if the threshold indicator should be drawn

@param VISIBLE
src/main/java/eu/hansolo/tilesfx/Tile.java