return (List<? extends Entity<?>>)values;
			} else {
				return new ArrayList(values);
			}
		} catch (IllegalAccessException e) {
			// TODO Handle exception
			throw new RuntimeException(e);
		} catch (InvocationTargetException e) {
			// TODO Handle exception
			throw new RuntimeException(e);
		} catch (NoSuchMethodException e) {
			return Collections.emptyList();
		}
	}
	
	@Override
	public Object getChild(int groupIdx, int childIdx) {
		return getGroup(groupIdx).getMember(childIdx);
	}

	@Override
	public int getChildCount(int groupIdx) {
		return getGroup(groupIdx).size();
	}

	@Override
	public EntityGroup<?, ?> getGroup(int idx) {
		return (EntityGroup<?, ?>)getModelValues().get(idx);
	}
	
	@Override
	public int getGroupCount() {
		return getModelValues().size();
	}

	@Override
	public Object getGroupfoot(int arg0) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public boolean hasGroupfoot(int arg0) {
		// TODO Auto-generated method stub
		return false;
	}

}

		tree.setAttribute("BrowserTreeComposer.selectionListener", listener);
	}
	
	public void onOpenForSelection(Event evt) {
		selectItem((Tree)evt.getTarget(), new TreePath((String)evt.getData()));
	}
	
	private void selectItem(Tree tree, TreePath path) {
		Treechildren treechildren = tree.getTreechildren();
		Treeitem item = null;
		for (int i = 0; i < path.depth(); i++) {
			if (treechildren.getChildren().size() == 0) {
				item.setOpen(true);
				Events.echoEvent("onOpenForSelection", tree, path.toString());
			}
			item = ((Treeitem)treechildren.getChildren().get(path.elementAt(i)));
			treechildren = item.getTreechildren();
		}
		item.setSelected(true);
		
	}

	public void onSelect(SelectEvent evt) {
		Treeitem item = (Treeitem)evt.getSelectedItems().iterator().next();