module SYSTEM:State_builder.Ref(Datatype.Make(siginclude Datatype.Undefinedtypet =Wpo.systemval name :stringval reprs :Wpo.system listval mem_project :(Project_skeleton.t -> bool) -> 'a -> boolend))(sigend)
include State_builder.S
type data
val set : data -> unitval get : unit -> dataval clear : unit -> unit