# Module Bucket.Int64

    module Int64: Make(Std_internal.Int64)

    type contents = C.t

    type t = {

`` | `mutable level : `contents`;`
`` | `size : `contents`;`

}

    val bin_size_t : t -> int

    val bin_write_t : Bin_prot.Common.buf ->
           pos:Bin_prot.Common.pos -> t -> Bin_prot.Common.pos

    val bin_writer_t : t Bin_prot.Type_class.writer

    val __bin_read_t__ : 'a -> pos_ref:Bin_prot.Common.pos Pervasives.ref -> 'b -> 'c

    val bin_read_t : Bin_prot.Common.buf -> pos_ref:Bin_prot.Common.pos_ref -> t

    val bin_reader_t : t Bin_prot.Type_class.reader

    val bin_t : t Bin_prot.Type_class.t

    val t_of_sexp : Sexplib.Sexp.t -> t

    val sexp_of_t : t -> Sexplib.Sexp.t

    val create : size:contents -> init_level:contents -> t

    val size : t -> contents

    val level : t -> contents

    val take : t -> C.t -> [> `Taken | `Unable ]

    val take_at_most : t -> C.t -> C.t

    val fill : t -> C.t -> unit