/**
  * @param \Generated\Shared\Transfer\NewsletterSubscriberTransfer $newsletterSubscriber
  * @param \Generated\Shared\Transfer\NewsletterTypeTransfer $newsletterType
  *
  * @return \Orm\Zed\Newsletter\Persistence\SpyNewsletterSubscription|null
  */
 protected function getSubscription(NewsletterSubscriberTransfer $newsletterSubscriber, NewsletterTypeTransfer $newsletterType)
 {
     if ($newsletterSubscriber->getSubscriberKey() !== null) {
         $subscriptionEntity = $this->queryContainer->querySubscriptionBySubscriberKeyAndNewsletterTypeName($newsletterSubscriber->getSubscriberKey(), $newsletterType->getName())->findOne();
         return $subscriptionEntity;
     }
     if ($newsletterSubscriber->getFkCustomer() !== null) {
         $subscriptionEntity = $this->queryContainer->querySubscriptionByIdCustomerAndNewsletterTypeName($newsletterSubscriber->getFkCustomer(), $newsletterType->getName())->findOne();
         return $subscriptionEntity;
     }
     return null;
 }