`sig
module G : Graph.Sig.G
module GraphAttrs :
sig
type t = G.t
module V :
sig
type t = G.V.t
val compare : t -> t -> int
val hash : t -> int
val equal : t -> t -> bool
type label
val create : label -> t
val label : t -> label
end
type vertex = V.t
module E :
sig
type t = G.E.t
val compare : t -> t -> int
type vertex = vertex
val src : t -> vertex
val dst : t -> vertex
type label
val create : vertex -> label -> vertex -> t
val label : t -> label
end
type edge = E.t
val is_directed : bool
val is_empty : t -> bool
val nb_vertex : t -> int
val nb_edges : t -> int
val out_degree : t -> vertex -> int
val in_degree : t -> vertex -> int
val mem_vertex : t -> vertex -> bool
val mem_edge : t -> vertex -> vertex -> bool
val mem_edge_e : t -> edge -> bool
val find_edge : t -> vertex -> vertex -> edge
val find_all_edges : t -> vertex -> vertex -> edge list
val succ : t -> vertex -> vertex list
val pred : t -> vertex -> vertex list
val succ_e : t -> vertex -> edge list
val pred_e : t -> vertex -> edge list
val iter_vertex : (vertex -> unit) -> t -> unit
val fold_vertex : (vertex -> 'a -> 'a) -> t -> 'a -> 'a
val iter_edges : (vertex -> vertex -> unit) -> t -> unit
val fold_edges : (vertex -> vertex -> 'a -> 'a) -> t -> 'a -> 'a
val iter_edges_e : (edge -> unit) -> t -> unit
val fold_edges_e : (edge -> 'a -> 'a) -> t -> 'a -> 'a
val map_vertex : (vertex -> vertex) -> t -> t
val iter_succ : (vertex -> unit) -> t -> vertex -> unit
val iter_pred : (vertex -> unit) -> t -> vertex -> unit
val fold_succ : (vertex -> 'a -> 'a) -> t -> vertex -> 'a -> 'a
val fold_pred : (vertex -> 'a -> 'a) -> t -> vertex -> 'a -> 'a
val iter_succ_e : (edge -> unit) -> t -> vertex -> unit
val fold_succ_e : (edge -> 'a -> 'a) -> t -> vertex -> 'a -> 'a
val iter_pred_e : (edge -> unit) -> t -> vertex -> unit
val fold_pred_e : (edge -> 'a -> 'a) -> t -> vertex -> 'a -> 'a
val graph_attributes : t -> Graph.Graphviz.DotAttributes.graph list
val default_vertex_attributes :
t -> Graph.Graphviz.DotAttributes.vertex list
val vertex_name : V.t -> string
val vertex_attributes : V.t -> Graph.Graphviz.DotAttributes.vertex list
val default_edge_attributes :
t -> Graph.Graphviz.DotAttributes.edge list
val edge_attributes : E.t -> Graph.Graphviz.DotAttributes.edge list
val get_subgraph : V.t -> Graph.Graphviz.DotAttributes.subgraph option
end
val create : unit -> DGraphModel.Make(GraphAttrs).model
end`