def METHOD_NAME(self, downloader, error, message):
    """
    Called when download fails. User can click 'Download' to
    try it again.
    """
    self["lblDownloadProgress"].set_markup(_("Download failed."))
    self["btDownload"].set_visible(True)
    self["pbDownload"].set_visible(False)
    self["vsyncthing_binary"].set_sensitive(True)
    self["btBrowse"].set_sensitive(True)
    self["btSave"].set_sensitive(True)