private Group getDefaultGroup() throws AppException {
final List<Element> elements = new ArrayList<Element>(20);
final List<Grid> grids = new ArrayList<Grid>(3);
final List<Field> fields = TypeContentRefecter.getAllFields(this.clazz);
Element element = null;
Grid grid = null;
Object value = null;
for (Field field : fields) {
element = field.getAnnotation(Element.class);
grid = field.getAnnotation(Grid.class);
if (element != null) {