Right now, our customization for enum tuple variants looks like this:

#[derive(DeriveGenerator)]
enum A {
    B(i32),
    C(i32, i32)
}

let g = gs::default::<A>().B(
    A::default_generator()
        .default_B().value(gs::just(42))
);

And I don't believe we have any way to configure tuple variants with multiple fields.

We should fix both. I think the ideal syntax looks like gs::default::<A>().B(gs::just(42)) and gs::default::<A>().C(gs::just(42), gs::just(43)).