module ArID:sig..end
type'aarbitrary ='a QCheck.arbitrary
type'agen ='a QCheck.Gen.t
val default_g : Libzipperposition.ID.t gen
val default : Libzipperposition.ID.t arbitraryval set_g : Libzipperposition.ID.Set.t gen
val set : Libzipperposition.ID.Set.t arbitrary