incremental.memoize
Incr_memoize.Store
incremental
incremental.incremental_step_function
type ('k, 'v) t
val create : 'k Store_params.t -> ('k, 'v) t
val find : ('k, 'v) t -> 'k -> 'v option
val add : ('k, 'v) t -> key:'k -> value:'v -> unit