// TreeLayer treeLayer = new TreeLayer(selectionLayer, new
// TreeRowModel<Datum>(treeData), true);
final TreeLayer treeLayer = new TreeLayer(selectionLayer,
new GlazedListTreeRowModel<Datum>(treeData));
ViewportLayer viewportLayer = new ViewportLayer(treeLayer);
ColumnHeaderLayer columnHeaderLayer = new ColumnHeaderLayer(
columnHeaderDataLayer, viewportLayer, selectionLayer);
// Note: The column header layer is wrapped in a filter row composite.
// This plugs in the filter row functionality