/**
  * Integrate field loading en showing and editing
  *
  * @param \MUtil_Model_ModelAbstract $model
  * @param boolean $addDependency True when editing, can be false in all other cases
  * @param string $respTrackId Optional Database column name where Respondent Track Id is set
  * @return \Gems_Tracker_Engine_TrackEngineAbstract
  */
 public function addFieldsToModel(\MUtil_Model_ModelAbstract $model, $addDependency = true, $respTrackId = false)
 {
     if ($this->_fieldsDefinition->exists) {
         // Add the data to the load / save
         $transformer = new AddTrackFieldsTransformer($this->loader, $this->_fieldsDefinition, $respTrackId);
         $model->addTransformer($transformer);
         if ($addDependency) {
             $dependency = $this->_fieldsDefinition->getDataModelDependency();
             if ($dependency instanceof DependencyInterface) {
                 $model->addDependency($dependency);
             }
         }
     }
     return $this;
 }