Constructs a message that, when send to Replicator, will perform an update of a structure stored under provided key. If a value will differ from the one already stored, a merge operation will be automatically performed in order for those values to converge. An optional consistency level may be provided to set up certain constraints on retrieved IUpdateResponse replied from replicator as a result. If no consistency will be provided, a WriteLocal will be used as a default.

public static Update Update<T>(
	IKey<T> key,
	T value,
	IWriteConsistency consistency = null
)
where T : Object, IReplicatedData<T>

static member Update : 
        key : IKey<'T> * 
        value : 'T * 
        ?consistency : IWriteConsistency 
(* Defaults:
        let _consistency = defaultArg consistency null
*)
-> Update  when 'T : Object and IReplicatedData<'T>