def add_ui(self, shell):
action_group = ActionGroup(shell, 'EqualizerActionGroup')
action_group.add_action(func=self.show_ui,
action_name='Equalize',
label=_('_Equalizer'),
action_type='app')
self._appshell = ApplicationShell(shell)
self._appshell.insert_action_group(action_group)
self._appshell.add_app_menuitems(ui_string, 'EqualizerActionGroup')
