handlePrices example

foreach ($orders as $order) {
            $orderId = $order->getId();

            try {
                $operation = $operations[$orderId] ?? null;

                if ($operation === null) {
                    continue;
                }

                $order = $this->handlePrices($order);

                $config = clone $this->documentConfigLoader->load(self::TYPE, $order->getSalesChannelId(), $context);

                $config->merge($operation->getConfig());

                $number = $config->getDocumentNumber() ?: $this->getNumber($context, $order, $operation);

                $referenceDocumentNumber = $referenceInvoiceNumbers[$operation->getOrderId()];

                $now = (new \DateTime())->format(Defaults::STORAGE_DATE_TIME_FORMAT);