public InventoryCountSheet(InventoryCountModel model)
     : base(model)
 {
     _model = model;
     InitializeComponent();
     model.ItemsAdded.Subscribe(AddToLayout);
 }
 public InventoryCountController(InventoryCountModel model,
                                 ISheet sheet,
                                 IDialogFactory dialogFactory,
                                 IUpdateQuantity updateQuantity,
                                 IFetchItems fetchItems)
     : base(model, sheet)
 {
     _model = model;
     _dialogFactory = dialogFactory;
     _updateQuantity = updateQuantity;
     _fetchItems = fetchItems;
     model.CountRequest = CountHandler;
 }