VSTalk.Engine.ViewModel.Editors.ClientEditor.ClientEditorViewModel.StopListen C# (CSharp) Method

        public void StopListen()
        {
            if (_stateUnit != null)
            {
                _stateUnit.Unsubscribe();
            }
        }

 private void EditClientExecuted(Client client)
 {
     var clientVM = new ClientEditorViewModel(SelectedClient);
     var clientWindow = new ClientEditorWindow();
     var onClose = new Action(() =>
     {
         clientWindow.Close();
         clientVM.StopListen();
     });
     clientWindow.DataContext = clientVM;
     clientVM.Rejected += onClose;
     clientVM.Saved += onClose;
     clientWindow.Show();
 }