GroupStepper::updateFolderIndexes

private function updateFolderIndexes(array $folderMapIds, array $folderIndexIds, array $pageMapIds): void
{
	foreach ($folderMapIds as $oldFolderId => $newFolderId)
	{
		Folder::update($newFolderId, [
			'INDEX_ID' => $pageMapIds[ $folderIndexIds[$oldFolderId] ] ?? null
		]);
	}
}