So, another `Option<T>`-like?

I'm not sure I'm following with the article, I don't think there's much of a problem treating `java.util.Optional` as a `Maybe`-like.

Regardless of "monad" label, it does work ok at modelling a container with [0..1] element and provides `Functor` fmap + `Monad` bind to operate the values.

Looking at `Omittable` APIs, I don't think there's much difference with the latest `java.util.Optional`? Why should I pick `Omittable` over standard library `Optional` then?

Personally, I roll my own "header-only"-style `Nilable<T>` on personal repo. I like to merge `orElse` and `orElseGet` into a single overloaded `orElse`, turning it to bare `null` resistant due to deliberate ambiguous method resolution.

Curiously none of 3rd party `Option`-like JVM libraries have this behavior, so I had to make it myself.