code: @Override
      protected void handleTusUpload(AssemblyResponse response) throws IOException, ProtocolException {
          url = response.getSslUrl();
          totalUploadSize = getTotalUploadSize();
          processTusFiles(url);
          startExecutor();
      }
docs: If tus uploads are enabled, this method would be called by {@link Assembly#save()} to handle the file uploads
  
  @param response {@link AssemblyResponse}
  @throws IOException when there's a failure with file retrieval.
  @throws ProtocolException when there's a failure with tus upload.