private void addBoundaries( BoxData<?> box, XElement xparent ) {
			XElement xbounds = xparent.addElement( "bounds" );
			xbounds.addElement( "x" ).setInt( box.getX() );
			xbounds.addElement( "y" ).setInt( box.getY() );
			xbounds.addElement( "width" ).setInt( box.getWidth() );
			xbounds.addElement( "height" ).setInt( box.getHeight() );
		}