val to_hex : Bytes.t -> string
val trimmed : Bytes.t -> string
val unwrap_option : string -> 'a option -> 'b
val map_option : ('a -> 'b) -> 'c option -> 'd option
val get_option : 'a -> 'b option -> 'c
val show_option : ('a -> string) -> 'b option -> string
val show_pair : ('a -> string) -> ('b -> string) -> ('c * 'd) -> string
val show_tuple3 : ('a -> string) -> ('b -> string) -> ('c -> string) -> ('d * 'e * 'f) -> string
val bl2s : bytes list -> string
val so2s : string option -> string
val so2hs : Bytes.t option -> string
val bo2s : bool option -> string
val i64o2s : int64 option -> string
val (>>=?) : ('a, 'b) Lwt_result.t -> ('a -> ('c, 'b) Lwt_result.t) -> ('c, 'b) Lwt_result.t
val section : Lwt_log_core.section
val tracing : Lwt_log_core.section