public void setLeftValue(final double VALUE) {
        if (null == leftValue) {
            _leftValue = VALUE;
            fireTileEvent(REDRAW_EVENT);
        } else {
            if (!leftValue.isBound()) {
                leftValue.set(VALUE);
            }
        }
    }
Returns the lower right region.
Only if the getSkin() != null
@return the lower right region
src/main/java/eu/hansolo/tilesfx/Tile.java