GWT RequestFactory populate tree structure

Hello,

I have a problem using RequestFactory form GWT 2.2
Is there a way to populate a whole tree structure from the data model
on one single request?
My model looks like this:

Hierarchy {
Set<Hierarchy> getChildren();
}

When I use request.with("children") method all I get is one extra
level of a tree. Of course I can fetch one tree level at a time or get
all Hierarchy objects and build a tree on the client, but it doesn't
seem right. Is there a smart way to achieve this?

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