pub fn keyed_counter_service<'a, L: Location<'a> + NoTick>(
increment_requests: KeyedStream<u32, String, L, Unbounded>,
get_requests: KeyedStream<u32, String, L, Unbounded>,
) -> (KeyedStream<u32, String, L, Unbounded>, KeyedStream<u32, (String, usize), L, Unbounded, NoOrder>)