public function getModificators($discountTypeId = false, $discountId = false)
 {
     $items = discountModificator::getList($discountTypeId);
     if ($discountId) {
         $discount = discount::get($discountId);
         $discountModId = $discount->getDiscountModificator()->getObject()->modificator_type_id;
         foreach ($items as $i => $mod) {
             $items[$i] = array('attribute:id' => $mod->id, 'attribute:name' => $mod->name);
             if ($mod->id == $discountModId) {
                 $items[$i]['attribute:selected'] = 'selected';
             }
         }
     }
     return array('items' => array('nodes:item' => $items));
 }