getMailTemplatesMapping example

    public function getCreationTimestamp(): int
    {
        return 1571660203;
    }

    public function update(Connection $connection): void
    {
        $defaultLangId = $this->getLanguageIdByLocale($connection, 'en-GB');
        $deLangId = $this->getLanguageIdByLocale($connection, 'de-DE');

        foreach ($this->getMailTemplatesMapping() as $technicalName => $mailTemplate) {
            if ($defaultLangId !== $deLangId) {
                $sql = <<<'SQL' UPDATE `mail_template_type_translation` SET `name` = :name WHERE `mail_template_type_id` = (SELECT `id` FROM `mail_template_type` WHERE `technical_name` = :technicalName) AND `language_id` = :lang SQL;

                $connection->executeStatement($sql, ['name' => $mailTemplate['name'], 'technicalName' => $technicalName, 'lang' => $defaultLangId]);
            }

            if ($defaultLangId !== Uuid::fromHexToBytes(Defaults::LANGUAGE_SYSTEM)) {