A module internal to Incremental. Users should see Incremental_intf.
An on-update handler is stored in a node or an observer, and is run at the end of a stabilization either when the value of the node changes, when the handler is installed, or when the node becomes invalid.
module Node_update : sig ... end
include sig ... end
val sexp_of_t : ('a ‑> Sexplib.Sexp.t) ‑> 'a t ‑> Sexplib.Sexp.t
val create : ('a Node_update.t ‑> unit) ‑> at:Incremental_kernel__.Stabilization_num.t ‑> 'a t
val run : 'a t ‑> 'a Node_update.t ‑> now:Incremental_kernel__.Stabilization_num.t ‑> unit