polkit.addRule(function(action, subject) {
    if (action.id == "org.freedesktop.login1.suspend" ||
        action.id == "org.freedesktop.login1.suspend-multiple-sessions" ||
        action.id == "org.freedesktop.login1.hibernate" ||
        action.id == "org.freedesktop.login1.hibernate-multiple-sessions") {
        
        if (subject.isInGroup("power")) {
            return polkit.Result.YES;
        }
        
        return polkit.Result.NO;
    }
});