Incr.Updatetype 'a t = 'a Incremental.Update.t = include Ppx_compare_lib.Comparable.S1 with type 'a t := 'a tval compare :
'a Base__Ppx_compare_lib.compare ->
'a t Base__Ppx_compare_lib.compareval sexp_of_t : ('a -> Sexplib0.Sexp.t) -> 'a t -> Sexplib0.Sexp.t