rem: if(!this.exists(aPath)) { 
add: if (!this.exists(aPath)) { 
context: ext  : function (aPath){  if(!aPath) {    jslibError(null, "(no path defined)", "NS_ERROR_INVALID_ARG", JS_FILEUTILS_FILE+":ext");    return null;  }  if(!this.exists(aPath)) {    jslibError(null, "(file doesn't exist)", "NS_ERROR_UNEXPECTED", JS_FILEUTILS_FILE+":ext");    return null;  }  var rv;  try {     var leafName  = (new JS_FILEUTILS_FilePath(aPath)).leafName;    var dotIndex  = leafName.lastIndexOf('.');     rv=(dotIndex >= 0) ? leafName.substring(dotIndex+1) : "";   } catch(e) {     jslibError(e, "(unexpected error)", "NS_ERROR_UNEXPECTED", JS_FILEUTILS_FILE+":ext");    rv=null;  }  return rv;},
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/ad31f8ed11639845cff55b2a989a1a6243a89a9b/fileUtils.js/buggy/calendar/resources/content/jslib/io/fileUtils.js