Raven.Database.Prefetching.PrefetchingBehavior.AfterUpdate C# (CSharp) Method

		public void AfterUpdate(string key, Etag etagBeforeUpdate)
		{
			updatedDocuments.AddOrUpdate(key, s => new HashSet<Etag> { etagBeforeUpdate },
										  (s, set) => new HashSet<Etag>(set) { etagBeforeUpdate });
		}