/**
  * Extract duties from the item payload.
  *
  * There will only ever be one duty record for an item but returns an array
  * to remain consistent with interfaces of other response parsers and tax
  * record sets.
  *
  * @return EbayEnterprise_Tax_Model_Duty[]
  */
 protected function _extractDuties()
 {
     $dutyPricing = $this->_orderItem->getDutyPricing();
     $duties = [];
     if ($dutyPricing) {
         $duties[] = $this->_taxFactory->createTaxDuty($dutyPricing, $this->_itemId, $this->_addressId);
     }
     return $duties;
 }