public boolean isCancelled() {
    return state.isCancelled();
  }

  @Override
  public boolean isDone() {
    return state.isDone();
  }

  /*
   * ForwardingFluentFuture needs to override those methods, so they are not final.
   */
  @CanIgnoreReturnValue
  @Override
  public V get() throws InterruptedException, ExecutionException {
    state.maybeThrowOnGet(throwable);
    return value;
  }

        // getDeclaredField to throw a NoSuchFieldException when the field is definitely there.
        // For these users fallback to a suboptimal implementation, based on synchronized. This will
        // be a definite performance hit to those users.
        thrownAtomicReferenceFieldUpdaterFailure = atomicReferenceFieldUpdaterFailure;
        helper = new SynchronizedHelper();
      }
    }