e Header&lt;String&gt; addressHeader =
        new TextHeader(constants.cwCustomDataGridColumnAddress());

    public CustomHeaderBuilder() {
      super(dataGrid, false);
      setSortIconStartOfLine(false);
    }

    @Override
    protected boolean buildHeaderOrFooterImpl() {
      Style style = dataGrid.getResources().style();
      String groupHeaderCell = resources.styles().groupHeaderCell();

      // Add a 2x2 header above the checkbox and show friends columns.
      TableRowBuilder tr = startRow();