type 'a t
= ('a, Core_kernel.read_write) t
include sig ... end
val sexp_of_t : ('a ‑> Base.Sexp.t) ‑> 'a t ‑> Base.Sexp.t
include Core_kernel.Invariant.S1 with type a t := a t
val invariant : 'a Base__.Invariant_intf.inv ‑> 'a t Base__.Invariant_intf.inv