K.E
type t = Git__Object_graph.Make(Digestif.SHA1)(Store).K.E.t
val compare : t -> t -> int
type vertex = vertex
val src : t -> vertex
val dst : t -> vertex
type label = Git__Object_graph.Make(Digestif.SHA1)(Store).K.E.label
val create : vertex -> label -> vertex -> t
val label : t -> label