code: public static <R> RequestToken streamAsset(String id, int flags, DataStreamHandler<R> contentHandler, BaasHandler<R> handler) {
          return BaasAsset.doStreamAsset(id, null, -1, flags, contentHandler, handler);
      }
docs: Streams the file using the provided data stream handler.
  
  @param id       the name of the asset to download
  @param flags
  @param handler  the completion handler
  @param <R>      the type to transform the bytes to.
  @return a request token to handle the request