change value of modeldata and display

[fother]

TreeGrid<ModelData> tree....

new Button("abc", new SelectionListener<ButtonEvent>() {

@Override
public void componentSelected(final ButtonEvent ce) {

tree.getSelectionModel().getSelectedItem().set("name", "diego");

}

}));


I need change the name and display.. how I can do this? (my example dont work)

[fother]

final Record rec = tree.getStore().getRecord(tree.getSelectionModel().getSelectedItem());
rec.set("name", "diego");


this work :D