public function __construct() {
parent::__construct('mailing', [
'id' => ts('Mailing ID'),
public function __construct() {
parent::__construct('mailing', [
'id' => ts('Mailing ID'),
'name' => ts('Mailing Name'),
'group' => ts('Mailing Group(s)'),
'subject' => ts('Mailing Subject'),
'name' => ts('Mailing Name'),
'group' => ts('Mailing Group(s)'),
'subject' => ts('Mailing Subject'),