rem: return null; 
add: if (!this._comments[index]) return null;  if (index == 0) return "suggestfirst";  return "suggesthint"; 
context:   getStyleAt: function(index) {    return null;  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/0c475cfb822443e7e37fa122d070c2db264f0651/nsSearchSuggestions.js/buggy/browser/components/search/nsSearchSuggestions.js