// An outer row-group's summary cell spans across all inner row-group header-columns up to the start
// of the data area.
final int colSpan = crosstabLayout.getFirstColGroupIndex() - gidx;
CrosstabOutputHelper.createAutomaticCell(layoutModelBuilder, colSpan, 1, group.getSummaryHeader());
crosstabLayout.setRowHeader(gidx - crosstabLayout.getFirstRowGroupIndex(), layoutModelBuilder.dangerousRawAccess().getInstanceId());
outputFunction.getRenderer().add(group.getSummaryHeader(), outputFunction.getRuntime());
layoutModelBuilder.finishBox();
crosstabLayout.startSummaryRowProcessing(true, gidx, group.getField());
crosstabLayout.setDetailsRendered(false);