private function getIds(
        $collection = null,
        $systemCollections = true,
        $types = null,
        $search = null,
        $orderBy = null,
        $orderSort = null,
        $limit = null,
        $offset = null
    ) {
        $subQuery = $this->getIdsQuery(
            $collection,
            $systemCollections,
            $types,
            $search,
            $orderBy,
            $orderSort,
            $limit,
            $offset
        );

        return $subQuery->getScalarResult();
    }