class bs a m =
    let _mode = m and _arch = a in
    let bsh = bs_open _arch _mode in
    object
        method test code addr count =
            let a =
              match bs with
              | None ->
                let b = 42 in
                printf ":(\n";
                b
              | Some _ ->
                let b = 43 in
                printf "Hello world\n";
                b
            in
              printf "value was: %d\n" a
    end;;