question: public Rectangle2D expand ( 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 ; }
target:  Expands an area by the amount of space represented by this object.