Imperative.HashtblSimpleNodeSourcemodule Elt : HetHashtbl.HETEROGENEOUS_HASHED_TYPEmodule Relation : Parameters.GENERIC_GROUPinclude Parameters.SIMPLE_GENERIC_ELT with type 'a t = 'a Elt.tpolymorphic equality on elements
type 'a parent = | Node : 'b t * ('a, 'b) Relation.t -> 'a parent| RootThe type of parents. A term either points to: