Logs.Tag
val def : ?doc:string -> string -> (Format.formatter -> 'a -> unit) -> 'a def
val name : 'a def -> string
val doc : 'a def -> string
val printer : 'a def -> Format.formatter -> 'a -> unit
val pp_def : Format.formatter -> 'a def -> unit
val list : unit -> def_e list
val pp : Format.formatter -> t -> unit
val empty : set
val is_empty : set -> bool
val pp_set : Format.formatter -> set -> unit