public function updatePackItems($product)
 {
     Pack::deleteItems($product->id);
     if (Tools::getValue('ppack') and $items = Tools::getValue('inputPackItems') and sizeof($ids = array_unique(explode('-', $items)))) {
         if (!Pack::addItems($product->id, $ids)) {
             return false;
         }
     }
     return true;
 }