Group::getSiteIds

private function getSiteIds(int $groupId): array
{
	$siteIds = [];

	$queryObject = WorkgroupSiteTable::getList([
		"filter" => [
			"GROUP_ID" => $groupId
		],
		"select" => ["SITE_ID"]
	]);
	while ($workGroupSite = $queryObject->fetch())
	{
		$siteIds[] = $workGroupSite["SITE_ID"];
	}
	$siteIds = array_unique($siteIds);

	return $siteIds;
}