Module type ExtSMap.OrderedType

module type OrderedType = sig .. end

Module type that extends the Map.OrderedType with some information needed to print the Map

include Map.OrderedType

val string_of : t -> string

A function that prints the values of type t

val sep : string

String that is used to seperate the different mapping contents. Often you can use comma.

val mapto : string

this is the string used to seperate the key from the imange, often you can use ->