OpenTween.Twitter.CreateFavoritePostsFromJson C# (CSharp) Method

        private long? CreateFavoritePostsFromJson(TwitterStatus[] items, bool read)
        {
            var favTab = TabInformations.GetInstance().GetTabByType(MyCommon.TabUsageType.Favorites);
            long? minimumId = null;

            foreach (var status in items)
            {
                if (minimumId == null || minimumId.Value > status.Id)
                    minimumId = status.Id;

                //二重取得回避
                lock (LockObj)
                {
                    if (favTab.Contains(status.Id)) continue;
                }

                var post = CreatePostsFromStatusData(status, true);

                post.IsRead = read;

                TabInformations.GetInstance().AddPost(post);
            }

            return minimumId;
        }