/**
* Fetch OmbProbleemfactor which references this OmbAanwezigeprobleemfactor. Will return null in case reference is invalid.
* `omb_aanwezigeprobleemfactor`.`probleemfactor` -> `omb_probleemfactor`.`id`
*
* @param PDO $db a PDO Database instance
* @param array $sort array of DSC instances
* @return OmbProbleemfactor
*/
public function fetchOmbProbleemfactor(PDO $db, $sort = null)
{
$filter = array(OmbProbleemfactor::FIELD_ID => $this->getProbleemfactor());
$result = OmbProbleemfactor::findByFilter($db, $filter, true, $sort);
return empty($result) ? null : $result[0];
}
