public function configureClassesToCompile()
    {
        if (\PHP_VERSION_ID >= 70000) {
            return;
        }

        $this->addClassesToCompile([
            CDNInterface::class,
            CloudFront::class,
            Fallback::class,
            PantherPortal::class,
            Server::class,
            Pixlr::class,
            Local::class,
            Replicate::class,
            DefaultGenerator::class,
            GeneratorInterface::class,
            ODMGenerator::class,
            PHPCRGenerator::class,
            AmazonMetadataBuilder::class,
            MetadataBuilderInterface::class,
            NoopMetadataBuilder::class,
            ProxyMetadataBuilder::class,
            Gallery::class,
            GalleryHasMedia::class,
            GalleryHasMediaInterface::class,
            GalleryInterface::class,
            GalleryManager::class,
            GalleryManagerInterface::class,
            Media::class,
            MediaInterface::class,
            MediaManagerInterface::class,
            BaseProvider::class,
            BaseVideoProvider::class,
            DailyMotionProvider::class,
            FileProvider::class,
            ImageProvider::class,
            MediaProviderInterface::class,
            Pool::class,
            VimeoProvider::class,
            YouTubeProvider::class,
            ResizerInterface::class,
            SimpleResizer::class,
            SquareResizer::class,
            DownloadStrategyInterface::class,
            ForbiddenDownloadStrategy::class,
            PublicDownloadStrategy::class,
            RolesDownloadStrategy::class,
            SessionDownloadStrategy::class,
            ConsumerThumbnail::class,
            FormatThumbnail::class,
            ThumbnailInterface::class,
            MediaExtension::class,
        ]);
    }