@Override
    public void configureRegistry(IConfigRegistry configRegistry) {
        configRegistry.registerConfigAttribute(
                CellConfigAttributes.CELL_PAINTER,
                new BeveledBorderDecorator(new ColumnGroupHeaderTextPainter()),
                DisplayMode.NORMAL,
                GridRegion.COLUMN_GROUP_HEADER);
        // We are not setting a special configuration for rendering grid lines,
        // as this would override the column header configuration. This is
        // because the the column group header is part of the column header
        // region.
    }