code: protected static SingleBenchmarkResult createMerge(
              SolverBenchmarkResult solverBenchmarkResult, ProblemBenchmarkResult problemBenchmarkResult,
              SingleBenchmarkResult oldResult) {
          SingleBenchmarkResult newResult = new SingleBenchmarkResult(solverBenchmarkResult, problemBenchmarkResult);
          newResult.subSingleBenchmarkResultList = new ArrayList<>(oldResult.getSubSingleBenchmarkResultList().size());
          int subSingleBenchmarkIndex = 0;
          for (SubSingleBenchmarkResult oldSubResult : oldResult.subSingleBenchmarkResultList) {
              SubSingleBenchmarkResult.createMerge(newResult, oldSubResult, subSingleBenchmarkIndex);
              subSingleBenchmarkIndex++;
          }
          newResult.median = oldResult.median;
          newResult.best = oldResult.best;
          newResult.worst = oldResult.worst;
          solverBenchmarkResult.getSingleBenchmarkResultList().add(newResult);
          problemBenchmarkResult.getSingleBenchmarkResultList().add(newResult);
          return newResult;
      }
docs: ************************************************************************