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

		private static Etag GetHighestEtag(List<JsonDocument> past)
		{
			JsonDocument jsonDocument = GetHighestJsonDocumentByEtag(past);
			if (jsonDocument == null)
				return Etag.Empty;
			return jsonDocument.Etag ?? Etag.Empty;
		}