Order/EventListener/OrderListener.php
protected function updateState(SaleInterface $sale)
    {
        if (parent::updateState($sale)) {
            if (in_array($sale->getState(), OrderStates::getStockableStates(), true)) {
                if (($sale->getState() === OrderStates::STATE_COMPLETED) && (null === $sale->getCompletedAt())) {
                    $sale->setCompletedAt(new \DateTime());
                } elseif (($sale->getState() !== OrderStates::STATE_COMPLETED) && (null !== $sale->getCompletedAt())) {
                    $sale->setCompletedAt(null);
                }

                if (null === $sale->getAcceptedAt()) {
                    $sale->setAcceptedAt(new \DateTime());
                }
            } else {
                $sale
                    ->setAcceptedAt(null)
                    ->setCompletedAt(null);
            }

            return true;
        }

        return false;
    }
protected function updateState(SaleInterface $sale)
    {
        if (parent::updateState($sale)) {
            if (in_array($sale->getState(), OrderStates::getStockableStates(), true)) {
                if (($sale->getState() === OrderStates::STATE_COMPLETED) && (null === $sale->getCompletedAt())) {
                    $sale->setCompletedAt(new \DateTime());
                } elseif (($sale->getState() !== OrderStates::STATE_COMPLETED) && (null !== $sale->getCompletedAt())) {
                    $sale->setCompletedAt(null);
                }

                if (null === $sale->getAcceptedAt()) {
                    $sale->setAcceptedAt(new \DateTime());
                }
            } else {
                $sale
                    ->setAcceptedAt(null)
                    ->setCompletedAt(null);
            }

            return true;
        }

        return false;
    }
@inheritdoc

@param OrderInterface $sale