Ordered_collection_common (base.Base.Ordered_collection

val get_pos_len_exn : 
  ?pos:int ->
  ?len:int ->
  unit ->
  total_length:int ->
  int * int

val check_pos_len_exn : pos:int -> len:int -> total_length:int -> unit

module Private : sig ... end

val get_pos_len : 
  ?pos:int ->
  ?len:int ->
  unit ->
  total_length:int ->
  (int * int, Base__.Info.t) result