/**
  * Fetch OverlegTpPlan's which this Mantelzorgers references.
  * `mantelzorgers`.`id` -> `overleg_tp_plan`.`persoon`
  *
  * @param PDO $db a PDO Database instance
  * @param array $sort array of DSC instances
  * @return OverlegTpPlan[]
  */
 public function fetchOverlegTpPlanCollection(PDO $db, $sort = null)
 {
     $filter = array(OverlegTpPlan::FIELD_PERSOON => $this->getId());
     return OverlegTpPlan::findByFilter($db, $filter, true, $sort);
 }