templateDataContainsSalesChannel example

if (($salesChannelId !== null && !isset($templateData['salesChannel'])) || $this->isTestMode($data)) {
            $criteria = $this->getSalesChannelDomainCriteria($salesChannelId, $context);

            /** @var SalesChannelEntity|null $salesChannel */
            $salesChannel = $this->salesChannelRepository->search($criteria, $context)->get($salesChannelId);

            if ($salesChannel === null) {
                throw new SalesChannelNotFoundException($salesChannelId);
            }

            $templateData['salesChannel'] = $salesChannel;
        } elseif ($this->templateDataContainsSalesChannel($templateData)) {
            $salesChannel = $templateData['salesChannel'];
        }

        $senderEmail = $data['senderMail'] ?? $this->getSender($data, $salesChannelId);

        if ($senderEmail === null) {
            $event = new MailErrorEvent(
                $context,
                Level::Error,
                null,
                'senderMail not configured for salesChannel: ' . $salesChannelId . '. Please check system_config \'core.basicInformation.email\'',