if (ATOMIC_HELPER.casValue(this, null, valueToSet)) {
      complete(this, /*callInterruptTask=*/ false);
      return true;
    }
    return false;
  }

  /**
   * Sets the failed result of this {@code Future} unless this {@code Future} has already been
   * cancelled or set (including {@linkplain #setFuture set asynchronously}). When a call to this

  }

  private void forceSet(V value) {
    this.value = value;
    this.state = State.VALUE;
    notifyAndClearListeners();
  }

  @CanIgnoreReturnValue
  protected boolean setFuture(ListenableFuture<? extends V> future) {
    checkNotNull(future);

    // If this future is already cancelled, cancel the delegate.
    // TODO(cpovirk): Should we do this at the end of the method, as in the server version?