code: @Override
      public void parallel(ConcurrentParallelCall runnerLambda, ConcurrentParallelOpCall opLambda) {
          final ConcurrentParallelOption option = createConcurrentParallelOption(opLambda);
          try {
              readyGo(runnerLambda, option);
          } catch (LaCountdownRaceExecutionException e) {
              throwConcurrentParallelRunnerException(option, e);
          }
      }
docs: ========