code: @WorkerThread
    public static LottieResult<LottieComposition> fromUrlSync(Context context, String url) {
      return NetworkFetcher.fetchSync(context, url);
    }
docs: Fetch an animation from an http url. Once it is downloaded once, Lottie will cache the file to disk for
  future use. Because of this, you may call `fromUrl` ahead of time to warm the cache if you think you
  might need an animation in the future.