public BooleanProperty oldValueVisibleProperty() {
        if (null == oldValueVisible) {
            oldValueVisible = new BooleanPropertyBase(_oldValueVisible) {
                @Override protected void invalidated() { fireTileEvent(VISIBILITY_EVENT); }
                @Override public Object getBean() { return Tile.this; }
                @Override public String getName() { return "oldValueVisible"; }
            };
        }
        return oldValueVisible;
    }
Defines if the old value of the tile should be visible (not implemented)

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