* <p>If the combiner throws a {@code CancellationException}, the returned future will be
     * cancelled.
     *
     * <p>Canceling this Future will attempt to cancel all the component futures.
     *
     * @since 23.6
     * @return a future whose result is based on {@code combiner} (or based on the input futures
     *     passed to {@code whenAllSucceed}, if that is the method you used to create this {@code