columnGroupExpandCollapseLayer = new ColumnGroupExpandCollapseLayer(
columnHideShowLayer, columnGroupModel);
selectionLayer = new SelectionLayer(columnGroupExpandCollapseLayer);
viewportLayer = new ViewportLayer(selectionLayer);
final FreezeLayer freezeLayer = new FreezeLayer(selectionLayer);
final CompositeFreezeLayer compositeFreezeLayer = new CompositeFreezeLayer(
freezeLayer, viewportLayer, selectionLayer);
setUnderlyingLayer(compositeFreezeLayer);
}