code: protected function getAvailability(
          FosAvailabilityAlertSubscription $fosAvailabilityAlertSubscription
      ) {
          $productAbstractAvailability = $this->availabilityFacade->getProductAbstractAvailability(
              $fosAvailabilityAlertSubscription->getFkProductAbstract(),
              $fosAvailabilityAlertSubscription->getFkLocale()
          );
  
          return $productAbstractAvailability->getAvailability();
      }
docs: @param \Orm\Zed\AvailabilityAlert\Persistence\FosAvailabilityAlertSubscription $fosAvailabilityAlertSubscription
  
  @return int