// rendering column keys
RepeatingView value = new RepeatingView("value");
tr.add(value);
for (RenderCell cell : row.getValueCells()) {
if (cell instanceof HeaderValueRenderCell) {
HeaderValueRenderCell headerValueRenderCell = (HeaderValueRenderCell) cell;
tmp = createValueLabel(value.newChildId(), headerValueRenderCell.getRawValue(),
headerValueRenderCell.getPivotField());
applyRowColSpan(cell, tmp);
value.add(tmp);
} else {
HeaderRenderCell headerRenderCell = (HeaderRenderCell) cell;
tmp = createTitleLabel(value.newChildId(), headerRenderCell.getPivotField());