/**
  * Add inventory to catalog in CRM.
  * @param String $catalogReference
  * @param String $productReference
  * @param AbstractProduct $abstractProduct
  */
 private function addInventory($catalogReference, $inventoryReference, $abstractProduct)
 {
     $price = $abstractProduct->getPrice();
     $currencyReference = $this->getCurrencyReference($abstractProduct->getCurrency());
     $currency = $this->trimReference($currencyReference);
     $catalogId = $this->trimReference($catalogReference);
     $inventoryId = $this->trimReference($inventoryReference);
     $this->insertInventoryToCatalog($catalogId, $inventoryId, $price, $currency);
 }