AttachmentLoaderCriteriaEvent example

    public function load(array $documentIds, Context $context): array
    {
        $attachments = [];
        $criteria = new Criteria($documentIds);
        $criteria->addAssociation('documentMediaFile');
        $criteria->addAssociation('documentType');

        $criteriaEvent = new AttachmentLoaderCriteriaEvent($criteria);
        $this->eventDispatcher->dispatch($criteriaEvent);

        $entities = $this->documentRepository->search($criteria, $context);

        /** @var DocumentEntity $document */
        foreach ($entities as $document) {
            $document = $this->documentGenerator->readDocument($document->getId(), $context);

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