BaconographyPortable.ViewModel.MessagesViewModel.GetMessages C# (CSharp) Метод

        private async void GetMessages()
        {
            if (_userLoggedIn)
            {
                if (Messages == null)
                {
                    Messages = new MessageViewModelCollection(_baconProvider);
                    Messages.CollectionChanged += Messages_CollectionChanged;
                    await Messages.LoadMoreItemsAsync(30);
                }
                else
                {
                    Messages.Refresh();
                }

                lock (this)
                {
                    _alreadyToastedMessages = new HashSet<string>(_liveTileService.GetMessagesMarkedRead());
                }
            }
        }

 private static void RefreshMessagesImpl(MessagesViewModel vm)
 {
     vm.GetMessages();
 }