pub async fn render_best_match_to_stream_with_context<IV>(
    req: IncomingRequest,
    resp_out: ResponseOutparam,
    routes: &RouteTable,
    app_fn: impl Fn() -> IV + 'static + Clone,
    additional_context: impl Fn() + Clone + Send + 'static,
    leptos_opts: &LeptosOptions
)
where IV: IntoView + 'static,