public function findOpen($limit = 999): array
    {
        $queryBuilder = $this->createQuery();

        return (array)$queryBuilder->select('*')
            ->from($this->getTableName())
            ->where($queryBuilder->expr()->eq('call_date', $queryBuilder->createNamedParameter(0)))
            ->setMaxResults($limit)
            ->execute()
            ->fetchAll();
    }