// and unpacking the exceptions like we do below (just much faster because it is a single
      // field read instead of a read, several branches and possibly creating exceptions).
      Object v = ((AbstractFuture<?>) future).value;
      if (v instanceof Cancellation) {
        // If the other future was interrupted, clear the interrupted bit while preserving the cause

  }

  private void notifyAndClearListeners() {
    afterDone();
    // TODO(lukes): consider adding the StackOverflowError protection from the server version
    // TODO(cpovirk): consider clearing this.delegate
    for (Listener listener : listeners) {
      listener.execute();
    }
    listeners = null;
  }

  protected void afterDone() {}

  @Override