final int decrementRemainingAndGet() {
    return ATOMIC_HELPER.decrementAndGetRemainingCount(this);
  }

  final void clearSeenExceptions() {
    seenExceptionsField = null;
  }

  @VisibleForTesting
  static String atomicHelperTypeForTest() {
    return ATOMIC_HELPER.atomicHelperTypeForTest();
  }

  private abstract static class AtomicHelper {

    Class<?> aggregateFutureStateClass =
        classLoader.loadClass(AggregateFutureState.class.getName());
    Field helperField = aggregateFutureStateClass.getDeclaredField("ATOMIC_HELPER");
    helperField.setAccessible(true);
    assertEquals(expectedHelperClassName, helperField.get(null).getClass().getSimpleName());
  }

  private static ClassLoader getClassLoader(Set<String> blocklist) {