/**
  * Execute method.
  *
  * @param \Magento\Framework\Event\Observer $observer
  *
  * @return $this
  */
 public function execute(\Magento\Framework\Event\Observer $observer)
 {
     $order = $observer->getEvent()->getOrder();
     $incrementId = $order->getIncrementId();
     $websiteId = $this->storeManager->getStore($order->getStoreId())->getWebsiteId();
     $orderSync = $this->helper->isOrderSyncEnabled($websiteId);
     if ($this->helper->isEnabled($websiteId) && $orderSync) {
         //register in queue with importer
         $this->importerFactory->create()->registerQueue(\Dotdigitalgroup\Email\Model\Importer::IMPORT_TYPE_ORDERS, [$incrementId], \Dotdigitalgroup\Email\Model\Importer::MODE_SINGLE_DELETE, $websiteId);
     }
     return $this;
 }