add: include (jslib_dirutils); this.mDirUtils = new DirUtils(); 
context: function FileUtils() {} // constructor
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/04c62db497a7a78bdddf378f4341134b12b61c5a/fileUtils.js/clean/calendar/resources/content/jslib/io/fileUtils.js