I have a project that has ``` val itemIds = req...

# http4k

[dmcg]

I have a project that has

val itemIds = request.form().map<Parameter, String> { it.first }
        .mapNotNull<String, ID<Item>> { ID<Item>(it) }
        .toSet<ID<Item>>()

I have sometimes seen warnings, or maybe errors, that Parameter isn’t visible, but it has always compiled eventually. Upgrading Kotlin to 2.1.20 it now won’t compile at all, although, it has to be said, the type parameters aren’t now required (I don’t know if or why they were previously).

Asking here in case anyone else has this issue. Was Parameter ever non-internal? If not does anyone know how this code compiled in the past?

[DanielZ]

We were using Parameter in our project, and with a http4k update it became internal (forgotten which version update it was) - we simple did a redefinition of that typealias in our codebase typealias Parameter = Pair<String, String?>

[DanielZ]

created PR https://github.com/http4k/http4k/pull/1361 for that.
Was facing that visibility issue in the context of Headers which are a typealias of Parameters