MediaFolderConfigurationIndexerEvent example

$this->connection,
            $this->connection->prepare('UPDATE media_folder_configuration SET media_thumbnail_sizes_ro = :media_thumbnail_sizes_ro WHERE id = :id')
        );

        foreach ($configs as $config) {
            $update->execute([
                'media_thumbnail_sizes_ro' => serialize($config->getMediaThumbnailSizes()),
                'id' => Uuid::fromHexToBytes($config->getId()),
            ]);
        }

        $this->eventDispatcher->dispatch(new MediaFolderConfigurationIndexerEvent($ids, $context, $message->getSkip()));
    }

    public function getTotal(): int
    {
        return $this->iteratorFactory->createIterator($this->repository->getDefinition())->fetchCount();
    }

    public function getDecorated(): EntityIndexer
    {
        throw new DecorationPatternException(static::class);
    }
}