val value : 'a t -> 'aval equal : 'a t -> 'a t -> Base.Bool.tpointer equality
val set : 'a t -> 'a -> Base.Unit.tval sexp_of_t : ('a -> Base.Sexp.t) -> 'a t -> Base.Sexp.t
Doubly_linked.Eltval value : 'a t -> 'aval equal : 'a t -> 'a t -> Base.Bool.tpointer equality
val set : 'a t -> 'a -> Base.Unit.tval sexp_of_t : ('a -> Base.Sexp.t) -> 'a t -> Base.Sexp.t