@Override
    public Rectangle clone() {
        try {
            return (Rectangle) super.clone();
        } catch (CloneNotSupportedException ex) {
            throw new AssertionError();
        }
    }
@param x the X value of the upper left corner of the rectangle
@param y the Y value of the upper left corner of the rectangle
@param width the width of the rectangle
@param height the height of the rectangle
jme3-core/src/main/java/com/jme3/font/Rectangle.java