Dolmen_model.ExtDefine model extensions.
val name : t -> stringExtension name, should be suitable for cli options.
val builtins : t -> Env.builtinsReturns the evaluation builtins from an extension.
val create : name:string -> builtins:Env.builtins -> tCreate a new extension.
val iter : (t -> unit) -> unitIterate over all the registered extensions.
val find_all : string -> t listReturns the extensions that have been registered with the given name.