A DESCRIPTION OF THE PROBLEM :
The comment of StructuredTaskScope#allUntil says:
         * <p> The following example uses {@code allUntil} to wait for all subtasks to
         * complete without any cancellation. This is similar to {@link #awaitAll()}
         * except that it yields a stream of the completed subtasks.
         * {@snippet lang=java :
         * <T> List<Subtask<T>> invokeAll(Collection<Callable<T>> tasks) throws InterruptedException {
         * try (var scope = StructuredTaskScope.open(Joiner.<T>allUntil(_ -> false))) {
         * tasks.forEach(scope::fork);
         * return scope.join().toList();
         * }
         * }
         * }

But instead of a stream, the example below returns a list.