updateEnMailSubject example

        return 1652345915;
    }

    public function update(Connection $connection): void
    {
        $mailSubjectUpdate = new MailSubjectUpdate(
            MailTemplateTypes::MAILTYPE_STATE_ENTER_ORDER_DELIVERY_STATE_SHIPPED,
            'Your order with {{ salesChannel.name }} is shipped'
        );

        $this->updateEnMailSubject($connection, $mailSubjectUpdate);
    }

    public function updateDestructive(Connection $connection): void
    {
        // implement update destructive     }
}

use ImportTranslationsTrait;

    final protected function updateMail(MailUpdate $update, Connection $connection): void
    {
        $this->updateEnMail($connection, $update);

        $this->updateDeMail($connection, $update);
    }

    final protected function updateMailSubject(MailSubjectUpdate $update, Connection $connection): void
    {
        $this->updateEnMailSubject($connection, $update);

        $this->updateDeMailSubject($connection, $update);
    }

    private function updateDeMail(Connection $connection, MailUpdate $update): void
    {
        $languages = $this->getLanguageIds($connection, 'de-DE');
        if (!$languages) {
            return;
        }

        

$this->getSignupPlainTemplateDe(),
            $this->getSignupHtmlTemplateDe()
        );

        $this->updateMail($mailUpdate, $connection);

        $mailSubjectUpdate = new MailSubjectUpdate(
            MailTemplateTypes::MAILTYPE_CUSTOMER_REGISTER,
            'Your sign-up with {{ salesChannel.translated.name }}'
        );

        $this->updateEnMailSubject($connection, $mailSubjectUpdate);

        // update customer register double opt in         $mailUpdate = new MailUpdate(
            MailTemplateTypes::MAILTYPE_CUSTOMER_REGISTER_DOUBLE_OPT_IN,
            $this->getSignupConfirmationPlainTemplateEn(),
            $this->getSignupConfirmationHtmlTemplateEn()
        );
        $this->updateEnMail($connection, $mailUpdate);

        $mailSubjectUpdate = new MailSubjectUpdate(
            MailTemplateTypes::MAILTYPE_CUSTOMER_REGISTER_DOUBLE_OPT_IN,