rem: menu.setLocation( evt.getPageX(), evt.getPageY() ); menu.setOpener( this ); menu.show(); evt.stopPropagation(); 
add: if( menu != null ) { menu.setLocation( evt.getPageX(), evt.getPageY() ); menu.setOpener( this ); menu.show(); evt.stopPropagation(); } 
context: qx.Proto._onContextMenu = function( evt ) {  var menu = this.getContextMenu();  menu.setLocation( evt.getPageX(), evt.getPageY() );  menu.setOpener( this );  menu.show();  evt.stopPropagation();}
meta: 8114	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8114/6d06a00480bc8720a9dcaa85497fdd5c23fe13ac/Tree.js/clean/bundles/org.eclipse.rap.rwt/js/org/eclipse/rap/rwt/widgets/Tree.js