public function getApprovedDate($as_label = true)
 {
     if ($this->approved_date) {
         return $this->approved_date;
     }
     if ($this->approved) {
         $approvation_date = StudentApprovedCareerSubjectPeer::retrieveApprovationDate($this->approved);
         if ($approvation_date) {
             return $this->approved ? $this->approved_date = new DateTime(StudentApprovedCareerSubjectPeer::retrieveApprovationDate($this->approved)) : ($as_label ? $this->getNullLabel() : null);
         }
     }
     return $as_label ? $this->getNullLabel() : null;
 }
 public function getApprovationDate()
 {
     return StudentApprovedCareerSubjectPeer::retrieveApprovationDate($this);
 }