/**
  * @return Payment_Model_DbTable_OrderItems
  */
 public static function getInstance()
 {
     if (is_null(self::$_instance)) {
         self::$_instance = new self();
     }
     return self::$_instance;
 }
 private function _createOrderItems($items, $id_page, $id_order)
 {
     $orderItemModel = Payment_Model_DbTable_OrderItems::getInstance();
     foreach ($items as $item) {
         //create order_items
         $orderItemModel->createFromParams($id_order, $item->getItemId());
         $item->updatePageItem($id_page);
     }
 }