val find : t -> int -> string optionval index : t -> string -> int optionval create_rw : 
  overwrite:bool ->
  path:string ->
  (t, [> Io.create_error ]) Stdlib.resultval open_rw : 
  size:Optint.Int63.t ->
  dead_header_size:int ->
  string ->
  (t, [> Io.open_error | Io.read_error | `Inconsistent_store ]) Stdlib.resultval open_ro : 
  size:Optint.Int63.t ->
  dead_header_size:int ->
  string ->
  (t, [> Io.open_error | Io.read_error | `Inconsistent_store ]) Stdlib.resultval refresh_end_poff : 
  t ->
  Optint.Int63.t ->
  (unit, [> Io.read_error | `Rw_not_allowed ]) Stdlib.resultval empty_buffer : t -> boolval end_poff : t -> Optint.Int63.tval close : t -> (unit, [> Io.close_error | `Pending_flush ]) Stdlib.result