protected function _getIds(array $ids, $primaryKey = self::PRIMARY_KEY)
    {
        $return = [];
        foreach ($ids as $id => $value) {
            if (is_array($value) && is_int($id) && (int) $value[$primaryKey] === 1) {
                $return[$id] = $id;
            }
        }

        return $return;
    }