/**
  * Fetch TpOudeRechten's which this PatientTp references.
  * `patient_tp`.`id` -> `tp_oude_rechten`.`patient_tp_id`
  *
  * @param PDO $db a PDO Database instance
  * @param array $sort array of DSC instances
  * @return TpOudeRechten[]
  */
 public function fetchTpOudeRechtenCollection(PDO $db, $sort = null)
 {
     $filter = array(TpOudeRechten::FIELD_PATIENT_TP_ID => $this->getId());
     return TpOudeRechten::findByFilter($db, $filter, true, $sort);
 }