/**
* Returns an array of only the persistent fields of {@link $model}
*
* @param ModelObject $model The modelObject to analyze
*
* @return array An array with persistent field names as keys with their values
*/
public function modelToPersistentArray(ModelObject $model)
{
$persistent = array_intersect_key($model->toArray(), array_flip($model->getPersistentFields()));
return $persistent;
}
