def on_retrieval_failed(self):
    self.heading_label.setText((('<h2>' + _('Update check failed')) + '</h2>'))
    self.detail_label.setText(_('Sorry, but we were unable to check for updates. Please try again later.'))
    self.pb.hide()
def on_retrieval_failed(self):
    self.heading_label.setText((('<h2>' + _('Update check failed')) + '</h2>'))
    self.detail_label.setText(_('Sorry, but we were unable to check for updates. Please try again later.'))
    self.pb.hide()