/**
  * @param Quote $quote
  * @param AccountUser|null $user
  * @param array|null $selectedOffers
  * @return Order
  */
 public function convert(Quote $quote, AccountUser $user = null, array $selectedOffers = null)
 {
     $accountUser = $user ?: $quote->getAccountUser();
     $account = $user ? $user->getAccount() : $quote->getAccount();
     $order = new Order();
     $order->setAccount($account)->setAccountUser($accountUser)->setOwner($quote->getOwner())->setOrganization($quote->getOrganization());
     if (!$selectedOffers) {
         foreach ($quote->getQuoteProducts() as $quoteProduct) {
             /** @var QuoteProductOffer $productOffer */
             $productOffer = $quoteProduct->getQuoteProductOffers()->first();
             $order->addLineItem($this->createOrderLineItem($productOffer));
         }
     } else {
         foreach ($selectedOffers as $selectedOffer) {
             /** @var QuoteProductOffer $offer */
             $offer = $selectedOffer[self::FIELD_OFFER];
             $order->addLineItem($this->createOrderLineItem($offer, (double) $selectedOffer[self::FIELD_QUANTITY]));
         }
     }
     $this->orderCurrencyHandler->setOrderCurrency($order);
     $this->fillSubtotals($order);
     return $order;
 }