return (gTransactionMgr.numberOfRedoItems > 0); 
return getTransactionMgr().canRedo(); 
function canRedo() {    return (gTransactionMgr.numberOfRedoItems > 0);}
5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5459/8f557b6620a7ffd0ae2bbc6b245ea6cb9b7a0fff/calendar-item-editing.js/clean/calendar/base/content/calendar-item-editing.js