module Backpatched: Backpatchedmodule Hole:sig..end
type 'a t
val create : 'a -> 'a tval of_hole : 'a Hole.t -> 'a tval get_exn : 'a t -> 'aget from a hole that has not been filled.val sexp_of_t : ('a -> Sexplib.Sexp.t) -> 'a t -> Sexplib.Sexp.tget from a hole that has not been filled.