Vaadin 6.7.7 and TreeTable component

Question

I have to use Vaadin 6.7.7 version.

In particular, I have to use TreeTable Component that I see in vaadin example/tutoria. But I can't to use this component in my project (Portlet with Vaadin 6.7.7).

The import

import com.vaadin.ui.TreeTable;

not work. Is this component present in this Vaadin version?