/**
* Fetch Verwantschap which references this Mantelzorgers. Will return null in case reference is invalid.
* `mantelzorgers`.`verwsch_id` -> `verwantschap`.`id`
*
* @param PDO $db a PDO Database instance
* @param array $sort array of DSC instances
* @return Verwantschap
*/
public function fetchVerwantschap(PDO $db, $sort = null)
{
$filter = array(Verwantschap::FIELD_ID => $this->getVerwschId());
$result = Verwantschap::findByFilter($db, $filter, true, $sort);
return empty($result) ? null : $result[0];
}
