sig
type t
val serialize : Ketrew_measurement.Collection.t -> string
val deserialize_exn : string -> Ketrew_measurement.Collection.t
val create : unit -> Ketrew_measurement.Collection.t
val add :
Ketrew_measurement.Collection.t -> Ketrew_measurement.Item.t -> unit
val clear : Ketrew_measurement.Collection.t -> unit
val concat :
Ketrew_measurement.Collection.t list -> Ketrew_measurement.Collection.t
val to_list :
Ketrew_measurement.Collection.t -> Ketrew_measurement.Item.t list
end