public static function unregisterZend()
 {
     if (!self::$zendLoaded) {
         return true;
     }
     require_once 'Zend/Loader.php';
     Zend_Loader::registerAutoLoad('Zend_Loader', false);
     self::$zendLoaded = false;
 }
 public static function unregisterZend()
 {
     if (!self::$zendLoaded) {
         return true;
     }
     Zend_Loader_Autoloader::resetInstance();
     spl_autoload_unregister(array('Zend_Loader_Autoloader', 'autoload'));
     self::$zendLoaded = false;
 }