GWT tree table data grid?

Can anyone tell me if exist in GWT the tree table data gid component?

I mean by tree table data grid a component that is:
- data grid like in GWT 2.4 (fixed header and footer and scrollable
content).
- content like CellTree (each row can be a tree node).

If didn't already exist in GWT 2.4 can be an option for GWT 2.5 ...?

Thank you in advanced.
CRISTI

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