}
return treeDataModel;
} else {
//TODO implement request caching
StackingTreeModel stackingTreeModel = new VisualStackingTreeModel(null);
if (getChildCount() > 0) {
Iterator children = getChildren().iterator();
while (children.hasNext()) {
UIComponent component = (UIComponent) children.next();
if (component instanceof StackingTreeModelProvider) {
StackingTreeModelProvider provider = (StackingTreeModelProvider) component;
stackingTreeModel.addStackingModel(provider.getStackingModel());
}
}
}
return stackingTreeModel;