FileIndexSearch::query

static function query($params = [])
{
	[$select, $runtime, $filter] = self::processParams($params);

	/** @var BitrixMainORMEntity $entity */
	$entity = IndexInternalsPathIndexTable::getEntity();
	foreach ($runtime as $field)
	{
		$entity->addField($field);
	}

	return new MainORMQueryQuery($entity);
}