[kubb]

There is another way, you can declare option as

   type Option[T any] *T

   nil is None

   opt == nil instead of IsNone()

   func Some[T any](t T) Option[T] { return &t }

   *opt instead of opt.Get()

   option.Map(opt, func(x int) double { return double(x) }) for the monadic behavior

I wish there was type inference for function arguments, so that you could write func(x) { return double(x) }. Maybe in a couple of years the Go team could be convinced.