/**
  * Get the quantity results for an item.
  *
  * @param Mage_Sales_Model_Quote_Item_Abstract
  * @return EbayEnterprise_Inventory_Model_Quantity|null
  */
 protected function _getQuantityResultForItem(Mage_Sales_Model_Quote_Item_Abstract $item)
 {
     return $this->_quantityCollector->getQuantityResultsForQuote($item->getQuote())->getQuantityBySku($this->_inventoryHelper->getRomSku($item->getSku()));
 }
 /**
  * Transfer data from a quote item to a quantity
  * request item payload.
  *
  * @param Mage_Sales_Model_Quote_Item_Abstract
  * @param IQuantityItem
  * @return IQuantityItem
  */
 public function itemToQuantityItem(Mage_Sales_Model_Quote_Item_Abstract $item, IQuantityItem $itemPayload)
 {
     return $itemPayload->setItemId($this->inventoryHelper->getRomSku($item->getSku()))->setLineId($item->getId());
 }