rem: return false; 
add: return null; 
context: function  testHistoryEntryTitle(nextHE, index){  if (!nextHE) {    alert("Didn't get history entry object");    return false;    }   // Get Title for the nextEntry   title = entry.title;      return title;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/e0e3a32c7d2e7f0e0d5fed54932a27821b36aa27/nsISHistoryTestLib.js/buggy/embedding/qa/jstests/sHistory/nsISHistoryTestLib.js