상속: INotifyPropertyChanged, IDisposable
 internal void ShowQueryResult(string name, string queryUri, string queryResult)
 {
     var viewModel = new QueryViewModel(name, queryUri, queryResult);
     Queries.Add(viewModel);
     viewModel.IsSelected = true;
     viewModel.Start();
 }
 private void CloseTab(QueryViewModel tabModel)
 {
     tabModel.Close();
     Queries.Remove(tabModel);
 }