val sexp_of_t : t -> Ppx_sexp_conv_lib.Sexp.tval t_of_sexp : Ppx_sexp_conv_lib.Sexp.t -> tval __t_of_sexp__ : Ppx_sexp_conv_lib.Sexp.t -> tval to_stream : t -> string Lwt_stream.tval of_stream : string Lwt_stream.t -> tval create_stream : ('a -> Cohttp.Transfer.chunk Lwt.t) -> 'a -> string Lwt_stream.t