public BooleanProperty trendVisibleProperty() {
        if (null == trendVisible) {
            trendVisible = new BooleanPropertyBase(_trendVisible) {
                @Override protected void invalidated() { fireTileEvent(VISIBILITY_EVENT); }
                @Override public Object getBean() { return Tile.this; }
                @Override public String getName() { return "trendVisible"; }
            };
        }
        return trendVisible;
    }
Defines the visibility of the trend indicator in the TimelineTileSkin
@param VISIBLE
src/main/java/eu/hansolo/tilesfx/Tile.java