/**
  * Returns a singleton instance.
  *
  * @param string $baseDir The Magento base directory
  * @return Faett_Core_Service The singleton instance
  */
 public static function get($baseDir)
 {
     if (Faett_Core_Factory::$_i === null) {
         Faett_Core_Factory::$_i = new Faett_Core_Service($baseDir);
     }
     // return the singleton
     return Faett_Core_Factory::$_i;
 }