sig
type t = string list * string list * (Event.t -> string)
val register : string -> Layout.t -> unit
val register_unnamed : Layout.t -> string
val get : string -> Layout.t
val minimal : Layout.t
val simple : Layout.t
val default : Layout.t
val pattern : string list -> string list -> string -> Layout.t
val html : Layout.t
val csv : string -> string list -> Layout.t
end