Module DGraphRandModel

module DGraphRandModel: sig .. end

module G: Graph.Sig.G 
module GraphAttrs: Graph.Graphviz.GraphWithDotAttrs  with type t = G.t
                                    and type V.t = G.V.t
                                    and type E.t = G.E.t
val create : unit -> DGraphModel.Make(GraphAttrs).model