public void setMiddleGraphics(final Node NODE) {
        if (null == middleGraphics) {
            _middleGraphics = NODE;
            fireTileEvent(RECALC_EVENT);
        } else {
            if (!middleGraphics.isBound()) {
                middleGraphics.set(NODE);
            }
        }
    }
Returns the lower right region.
Only if the getSkin() != null
@return the lower right region
src/main/java/eu/hansolo/tilesfx/Tile.java