GroupStepper::getPageIdsBySiteId

private function getPageIdsBySiteId(int $siteId): array
{
	$pageIds = [];
	$queryObject = LandingLanding::getList([
		'select' => ['ID'],
		'filter' => ['SITE_ID' => $siteId],
	]);
	while ($page = $queryObject->fetch())
	{
		$pageIds[] = $page['ID'];
	}
	return $pageIds;
}