Module Make_with_config.Node_value

type 'a t =
| Invalid
| Necessary_maybe_stale of 'a option
| Unnecessary_maybe_stale of 'a option
val sexp_of_t : ('a -> Ppx_sexp_conv_lib.Sexp.t) -> 'a t -> Ppx_sexp_conv_lib.Sexp.t