As I understand it, structured concurrency is part of the same deliverable, tracked in this JEP: https://openjdk.org/jeps/428

Here's the example from the JEP:

    Response handle() throws ExecutionException, InterruptedException {
        try (var scope = new StructuredTaskScope.ShutdownOnFailure()) {
            Future<String>  user  = scope.fork(() -> findUser());
            Future<Integer> order = scope.fork(() -> fetchOrder());
    
            scope.join();           // Join both forks
            scope.throwIfFailed();  // ... and propagate errors
    
            // Here, both forks have succeeded, so compose their results
            return new Response(user.resultNow(), order.resultNow());
        }
    }