code: @Override
    protected void doRunExample(final Engine engine) throws Exception {
      Task<?> task = createExtendedSummary(1);
  //    Task<?> task = Task.par(createExtendedSummary(1), createExtendedSummary(2));
  
      engine.run(task);
  
      runTaskAndPrintResults(engine, task);
    }
docs: ---------------------------------------------------------------