ActivityStreams.Persistence.StreamCrawler.StreamsToLoad C# (CSharp) Метод

        public Dictionary<byte[], long> StreamsToLoad(ActivityStream stream, long timestamp = 0)
        {
            AddOrUpdateStreamsToLoadWith(streamsToLoad, stream, timestamp);
            Stack<byte[]> streamsToCrawl = new Stack<byte[]>();
            streamsToCrawl.Push(stream.StreamId);

            while (streamsToCrawl.Count > 0)
            {
                Guard_AgainstStupidity();

                // Load next stream.
                var currentId = streamsToCrawl.Pop();
                var current = streamStore.Get(currentId) ?? ActivityStream.Empty;
                long currentExpiresAt = current.ExpiresAt;
                streamsToLoad.TryGetValue(current.StreamId, out currentExpiresAt);

                if (ActivityStream.IsEmpty(current)) continue;

                // Crawl only first level attached streams.
                foreach (var nested in current.AttachedStreams)
                {
                    if (IsCrawled(nested)) continue;

                    streamsToCrawl.Push(nested.StreamId);

                    var nestedShouldExpireAt = currentExpiresAt < nested.ExpiresAt ? currentExpiresAt : nested.ExpiresAt;
                    AddOrUpdateStreamsToLoadWith(streamsToLoad, nested, nestedShouldExpireAt);
                }
            }

            return streamsToLoad;
        }