/**
  * @return Tracker_FormElement_Field_List_Bind
  */
 public function getBind()
 {
     if (!$this->bind) {
         $this->bind = null;
         //retrieve the type of the bind first...
         $dao = new Tracker_FormElement_Field_ListDao();
         if ($row = $dao->searchByFieldId($this->id)->getRow()) {
             //...and build the bind
             $bf = new Tracker_FormElement_Field_List_BindFactory();
             $this->bind = $bf->getBind($this, $row['bind_type']);
         }
     }
     return $this->bind;
 }