final InstanceID[] columnHeaders = crosstabLayout.getColumnHeaderSubFlows();
for (int i = 0; i < columnHeaders.length; i++)
{
final InstanceID columnHeader = columnHeaders[i];
layoutModelBuilder.startSubFlow(columnHeader);
layoutModelBuilder.endSubFlow();
}
crosstabLayout.setCrosstabHeaderOpen(false);
}
final int gidx = event.getState().getCurrentGroupIndex();