[HELP] Using meta for project-reactor

[Khepu]

Hello!

I have kind of a weird question. I doubt that this can be done at the current state of the project, but one can hope.

I am trying to get some form of guarantee about the properties of my stream in project-reactor. For example:

data class Item(val id: String?, val name: String)

Flux.just(
        Item(id = null, name = "item"),
        Item(id = "1", name = "another item"))
    .filter { it.id != null }
    .doOnNext { println(it.id) } // At this point the id field should be inferred as non-nullable

I had a look at the Laws section of the documentation, which is what you would normally use to extend support to 3rd party libraries, but I can't see that working here.