public function getStateLabel()
    {
        switch ($this->State) {
            case self::STATE_OPEN:
                return _t(__CLASS__.'.STATE_OPEN', 'Active');
            case self::STATE_PUBLISHED:
                return _t(__CLASS__.'.STATE_PUBLISHED', 'Published');
            case self::STATE_REVERTED:
                return _t(__CLASS__.'.STATE_REVERTED', 'Reverted');
            default:
                return null;
        }
    }