CDiskStorage::filterByVersion

protected function filterByVersion(array $items, $version = 0)
{
	if($version == 0)
	{
		return $items;
	}

	/** @var BitrixDiskBaseObject $item */
	foreach ($items as $i => $item)
	{
		if(self::compareVersion($item->getUpdateTime()->getTimestamp() . '000', $version) < 0)
		{
			unset($items[$i]);
		}
	}

	return $items;
}