![Matt Novenstern](/assets/img/avatar_default.png)
Now if an id is passed to Notification.addButton that matches a theme icon, it will be displayed as an icon. This is another in the implement the music player mockups series. http://live.gnome.org/GnomeShell/Design/Guidelines/MessageTray/MusicPlayer https://bugzilla.gnome.org/show_bug.cgi?id=621014