public ContentVerifier(
     IManifestDownloader manifestDownloader,
     IContentFileVerifier contentFileVerifier,
     ILogger <ContentVerifier> logger)
 {
     _contentFileVerifier = contentFileVerifier;
     _manifestDownloader  = manifestDownloader;
     _logger = logger;
 }
        public void SetupServices()
        {
            if (settings != null && downloader != null)
            {
                return;
            }

            settings   = App.provider.GetService(typeof(IManifestSettings)) as IManifestSettings;
            downloader = App.provider.GetService(typeof(IManifestDownloader)) as IManifestDownloader;
        }