public function getHeader()
    {
        switch ($this->type) {
            case self::TYPE_ERROR:
                $header = 'Error!';
                break;
            case self::TYPE_WARNING:
                $header = 'Warning!';
                break;
            case self::TYPE_INFO:
                $header = 'Info';
                break;
            case self::TYPE_SUCCESS:
                $header = 'Success';
                break;
            default:
                $header = 'Info';
                break;
        }

        return $header;
    }