public Rectangle2D shrink(Rectangle2D area, Rectangle2D result) {
        if (result == null) {
            result = new Rectangle2D.Double();
        }
        result.setRect(
            area.getX() + this.left, 
            area.getY() + this.top,
            area.getWidth() - this.left - this.right,
            area.getHeight() - this.top - this.bottom
        );
        return result;