/** Remove the WebFileUploadListener. */
 public void removeWebFileUploadListener(final WebFileUploadListener lsnr) {
   WebFileUploadEvent.removeListener(this, lsnr);
 }
 /** Add a WebFileUploadListener to it. */
 public void addWebFileUploadListener(final WebFileUploadListener lsnr) {
   WebFileUploadEvent.addListener(this, lsnr);
 }