let string_to_int_seq_raw_item =
    generic_parser ~parse_sequence:(fun ~pedantic l ->
        let exploded = String.split ~on:' ' l in
        try
          output_ok (`partial_sequence 
                        (List.filter_map exploded (function
                          | "" -> None
                          | s -> Some (Int.of_string s))))
        with _ -> output_error (`malformed_partial_sequence l)
    )