ILayer rowHeaderLayer = null;
if (summaryRowOnTop) {
// in case of a summary row on top in the body region we use a
// specific FixedSummaryRowHeaderLayer
rowHeaderLayer = new FixedSummaryRowHeaderLayer(rowHeaderDataLayer,
bodyLayer, selectionLayer);
((FixedSummaryRowHeaderLayer) rowHeaderLayer).setSummaryRowLabel("\u2211");
}
else {
rowHeaderLayer = new RowHeaderLayer(rowHeaderDataLayer,