type t = ident option arrayval empty : tval print : Stdlib.out_channel -> t -> unitval read : Index.t -> Stdlib.in_channel -> tval write : Stdlib.out_channel -> t -> unitOByteLib.Symbtype t = ident option arrayval empty : tval print : Stdlib.out_channel -> t -> unitval read : Index.t -> Stdlib.in_channel -> tval write : Stdlib.out_channel -> t -> unit