Allow custom rules of what is considered Internal/External URL about browser HOT 3 OPEN

case urlRequest of
    Browser.Internal url ->
        if isReallyInternal url then
            ...

        else
            ...
       
    Browser.External href ->
          ...

        UrlChangeRequested request ->
            case request of
                Internal location ->
                    let
                        -- Checking pseudo-external urls (like /api/*, /auth/*, etc)
                        cmd =
                            if location.path == Config.urlBase then
                                location
                                    |> locationToRoute
                                    |> Redirect
                                    |> dispatch

                            else
                                location
                                    |> Url.toString
                                    |> External
                                    |> UrlChangeRequested
                                    |> dispatch
                    in
                    ( model, cmd )

                External url ->
                    ( model, Nav.load url )