Module Async_kernel__.Ivar_filler
val sexp_of_t : ('a -> Ppx_sexp_conv_lib.Sexp.t) -> 'a t -> Ppx_sexp_conv_lib.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
val create : unit -> 'a t * 'a Async_kernel__.Deferred0.t
val is_empty : 'a t -> bool
val fill : 'a t -> 'a -> unit