public function getSubdistrict($con = null)
 {
     include_once 'lib/model/om/BaseSubdistrictPeer.php';
     if ($this->aSubdistrict === null && $this->subdistrict_id !== null) {
         $this->aSubdistrict = SubdistrictPeer::retrieveByPK($this->subdistrict_id, $con);
     }
     return $this->aSubdistrict;
 }