public function process(OrderInterface $order)
{
$order->setCheckoutState(OrderCheckoutStates::STATE_COMPLETED);
$order->setShippingState(ShipmentInterface::STATE_PENDING);
$order->setPaymentState(PaymentInterface::STATE_PENDING);
$order->setState(OrderInterface::STATE_CONFIRMED);
$order->setOrderedAt(new \DateTime());
$this->confirmMailer->sendMail($order);
$this->cartProvider->abandonCart();
}