gistfile1.txt

 public function hasOrderItemMailingServicesOverlayCapability($item, $printGroupId)
    {
        $checkForProductMailingService = $item->getProduct()->getProductOptionValueByName(OptionValue::NAME_MAILING_SERVICE);

        return ($this->params['addressCount'] > 0 && !empty(MailingListLegacy::getInfo($printGroupId)) &&
            !empty($checkForProductMailingService && $checkForProductMailingService->getConfig()) &&
            $item->getSides() === 2);
    }