private function getExtendedField($alias)
    {
        $qf = $this->_em->getConnection()->createQueryBuilder();
        $qf->select('lf.id, lf.object, lf.type, lf.alias, lf.field_group as "group", lf.object, lf.label')
            ->from(MAUTIC_TABLE_PREFIX.'lead_fields', 'lf')
            ->where(
                $qf->expr()->andX(
                    $qf->expr()->eq('lf.alias', ':alias'),
                    $qf->expr()->orX(
                        $qf->expr()->eq('lf.object', $qf->expr()->literal('extendedField')),
                        $qf->expr()->eq('lf.object', $qf->expr()->literal('extendedFieldSecure'))
                    )
                )
            )
            ->setParameter('alias', $alias);

        return $qf->execute()->fetch();
    }