public async void FillWithChildren()
        {
            try
            {
                FeedResponse <DocumentCollection> colls;
                var db   = (Database)Tag;
                var dbId = db.Id;
                using (PerfStatus.Start("ReadDocumentCollectionFeed"))
                {
                    colls = await _client.ReadDocumentCollectionFeedAsync(db.GetLink(_client));
                }

                foreach (var coll in colls)
                {
                    var node = new DocumentCollectionNode(_client, coll, dbId);
                    Nodes.Add(node);
                }

                Program.GetMain().SetResponseHeaders(colls.ResponseHeaders);
            }
            catch (AggregateException e)
            {
                Program.GetMain().SetResultInBrowser(null, e.InnerException.ToString(), true);
            }
            catch (Exception e)
            {
                Program.GetMain().SetResultInBrowser(null, e.ToString(), true);
            }
        }
        async public void FillWithChildren()
        {
            try
            {
                FeedResponse<Documents.DocumentCollection> colls;
                using (PerfStatus.Start("ReadDocumentCollectionFeed"))
                {
                    colls = await this.client.ReadDocumentCollectionFeedAsync(((Documents.Database)this.Tag).GetLink(this.client));
                }

                foreach (Documents.DocumentCollection coll in colls)
                {
                    DocumentCollectionNode node = new DocumentCollectionNode(client, coll);
                    this.Nodes.Add(node);
                }

                Program.GetMain().SetResponseHeaders(colls.ResponseHeaders);
            }
            catch (AggregateException e)
            {
                Program.GetMain().SetResultInBrowser(null, e.InnerException.ToString(), true);
            }
            catch (Exception e)
            {
                Program.GetMain().SetResultInBrowser(null, e.ToString(), true);
            }
        }