module type Accessors =sig..end
Iobuf.Consume,
    Iobuf.Fill, Iobuf.Peek, and Iobuf.Poke.type ('a, 'd, 'w) t 
('d, 'w) Iobuf.t accessor function manipulating 'a, either writing it to the
      iobuf or reading it from the iobuf.val char : (char, 'd, 'w) tval int8 : (int, 'd, 'w) tval int16_be : (int, 'd, 'w) tval int16_le : (int, 'd, 'w) tval int32_be : (int, 'd, 'w) tval int32_le : (int, 'd, 'w) tval uint8 : (int, 'd, 'w) tval uint16_be : (int, 'd, 'w) tval uint16_le : (int, 'd, 'w) tval uint32_be : (int, 'd, 'w) tval uint32_le : (int, 'd, 'w) tval int64_be : (int, 'd, 'w) tval int64_le : (int, 'd, 'w) tval int64_t_be : (Int64.t, 'd, 'w) tval int64_t_le : (Int64.t, 'd, 'w) tval padded_fixed_string : padding:char -> len:int -> (string, 'd, 'w) tval string : ?str_pos:int -> ?len:int -> (string, 'd, 'w) tval bigstring : ?str_pos:int -> ?len:int -> (Bigstring.t, 'd, 'w) t