RestrictionManager::prepareData

static function prepareData(array $servicesIds, array $fields = array())
{
	if(empty($servicesIds))
		return;

	$serviceType = static::getServiceType();
	$cachedServices =
		isset(static::$cachedFields[$serviceType]) && is_array(static::$cachedFields[$serviceType])
			? array_keys(static::$cachedFields[$serviceType])
			: []
	;
	$ids = array_diff($servicesIds, $cachedServices);
	$idsForDb = array_diff($ids, array_keys($fields));

	if(!empty($idsForDb))
	{
		$dbRes = ServiceRestrictionTable::getList(array(
			'filter' => array(
				'=SERVICE_ID' => $idsForDb,
				'=SERVICE_TYPE' => $serviceType,
			),
			'order' => array('SORT' =>'ASC'),
		));

		while($restriction = $dbRes->fetch())
			self::setCache($restriction["SERVICE_ID"], $serviceType, $restriction);
	}

	foreach($fields as $serviceId => $serviceRestrictions)
	{
		if(is_array($serviceRestrictions))
		{
			foreach($serviceRestrictions as $restrId => $restrFields)
				self::setCache($serviceId, $serviceType, $restrFields);
		}
	}

	foreach($ids as $serviceId)
		self::setCache($serviceId, $serviceType);

	/** @var BitrixSaleServicesBaseRestriction  $className */
	foreach(static::getClassesList() as $className)
		$className::prepareData($ids);
}