}
            awaitUnchecked(barrier);
            return null;
          }
        };
    Callable<@Nullable Void> cancelRunnable =
        () -> {
          if (currentFuture.get().cancel(true)) {
            numSuccessfulSetCalls.incrementAndGet();
          }
          awaitUnchecked(barrier);
          return null;
        };

            }
            awaitUnchecked(barrier);
            return null;
          }
        };
    Callable<@Nullable Void> cancelRunnable =
        () -> {
          if (currentFuture.get().cancel(true)) {
            numSuccessfulSetCalls.incrementAndGet();
          }
          awaitUnchecked(barrier);
          return null;
        };

      CyclicBarrier barrier = new CyclicBarrier(numThreads + 1);
      Runnable wrapper =
          () -> {
            awaitUnchecked(barrier);
            task.run();
            awaitUnchecked(barrier);
          };
      for (int j = 0; j < 10; j++) {
        executor.execute(wrapper);
      }
      barrier.await(); // release the threads!

      CyclicBarrier barrier = new CyclicBarrier(numThreads + 1);
      Runnable wrapper =
          () -> {
            awaitUnchecked(barrier);
            task.run();
            awaitUnchecked(barrier);
          };
      for (int j = 0; j < 10; j++) {
        executor.execute(wrapper);
      }
      barrier.await(); // release the threads!