private void doNotGroupBarChart() {
// grouping
barChart.setCategorizer(new ResourceByUriMultiCategorizer());
// sorting by value
barChart.getContentDisplay().setVisualItemComparator(
new VisualItemDoubleComparator(BarChart.BAR_LENGTH));
// mappings
barChart.setResolver(BarChart.BAR_LABEL,
new FirstResourcePropertyResolver(
BenchmarkResourceSetFactory.TEXT_2, DataType.TEXT));
barChart.setResolver(BarChart.BAR_LENGTH, new CalculationResolver(