internal void AddRequestToQueue(RelationalToBlobSyncRequest request)
 {
     if (_allItems.ContainsKey(request.RequestKey) == false)
     {
         _allItems.TryAdd(request.RequestKey, request);
         _queue.Enqueue(request);
     }
 }
 internal bool MarkRequestCompleted(RelationalToBlobSyncRequest request)
 {
     return(_inProgressQueue.TryRemove(request.RequestKey, out var _));
 }