# Module DGraphSubTree

    module DGraphSubTree: sig .. end

    module type G = sig .. end

    module type Tree = sig .. end

    module type S = sig .. end

    module Make: functor (G : G) -> functor (Tree : Tree  with type V.label = G.V.t and type E.label = unit) -> sig .. end

    module Make_from_dot_model: functor (Tree : Tree  with type V.label = DGraphModel.DotG.V.t
    	       and type E.label = unit) -> sig .. end