super.onAfterFirstAttach();
}
protected void refresh() {
XElement tbody = table.getFirstChildElement().getNextSiblingElement().<XElement> cast();
tbody.removeChildren();
DomHelper.append(tbody, renderRows().asString());
}
protected <N, O> SafeHtml getRenderedValue(int row, int col) {
AggregationRowConfig<M> config = cm.getAggregationRow(row);