CIBlockElement::getIdOrder

protected function getIdOrder($order): string
{
	if (is_array($order))
	{
		MainTypeCollection::normalizeArrayValuesByInt($order, false);
		if (!empty($order))
		{
			return 'FIELD(BE.ID, '.implode(', ', $order).')';
		}
		else
		{
			return parent::getIdOrder('');
		}
	}
	return parent::getIdOrder($order);
}