question: public void applyShape ( Region shape ) { if ( XlibUtil . isShapingSupported ( ) ) { if ( shapeLog . isLoggable ( PlatformLogger . Level . FINER ) ) { shapeLog . finer ( "*** INFO: Setting shape: PEER: " + this + "; WINDOW: " + getWindow ( ) + "; TARGET: " + target + "; SHAPE: " + shape ) ; } XToolkit . awtLock ( ) ; try { if ( shape != null ) { XlibWrapper . SetRectangularShape ( XToolkit . getDisplay ( ) , getWindow ( ) , shape . getLoX ( ) , shape . getLoY ( ) , shape . getHiX ( ) , shape . getHiY ( ) , ( shape . isRectangular ( ) ? null : shape ) ) ; } else { XlibWrapper . SetRectangularShape ( XToolkit . getDisplay ( ) , getWindow ( ) , 0 , 0 , 0 , 0 , null ) ; } } finally { XToolkit . awtUnlock ( ) ; } } else { if ( shapeLog . isLoggable ( PlatformLogger . Level . FINER ) ) { shapeLog . finer ( "*** WARNING: Shaping is NOT supported!" ) ; } } }
target:  Applies the shape to the X-window.