mappingAttachments example

$documentIds = $extensions->getDocumentIds();

        if (!empty($eventConfig['documentTypeIds']) && \is_array($eventConfig['documentTypeIds']) && $orderId) {
            $latestDocuments = $this->getLatestDocumentsOfTypes($orderId, $eventConfig['documentTypeIds']);

            $documentIds = array_unique(array_merge($documentIds, $latestDocuments));
        }

        if (!empty($documentIds)) {
            $extensions->setDocumentIds($documentIds);
            $attachments = $this->mappingAttachments($documentIds, $attachments, $context);
        }

        if (empty($extensions->getMediaIds())) {
            return $attachments;
        }

        $criteria = new Criteria($extensions->getMediaIds());
        $criteria->setTitle('send-mail::load-media');

        /** @var MediaCollection<MediaEntity> $entities */
        $entities = $this->mediaRepository->search($criteria, $context);