/**
     * @return array
     */
    public static function getSubscribedEvents()
    {
        return [
            EccubeEvents::ADMIN_ORDER_MAIL_INDEX_INITIALIZE => 'adminOrderMailIndexInitialize',
        ];
    }

    /**
     * メールテンプレートの選択肢を追加する.
     *
     * @param TemplateEvent $event
     */
    public function adminOrderMailIndexInitialize(EventArgs $eventArgs)
    {
dump($eventArgs);
die;
    }

protected $config;

public function __construct(EccubeConfig $config)
{
  $this->config = $config;
}