anchor.diff:          match event {
               Quit => gtk::main_quit(),
           }
  +    }
  +
  +    // Create the widgets.
  +    fn view(relm: RemoteRelm<Msg>, _model: &Self::Model) -> Self {
  +        // GTK+ widgets are used normally within a `Widget`.
  +        let window = Window::new(WindowType::Toplevel);
  +        // Connect the signal `delete_event` to send the `Quit` message.
  +        connect_no_inhibit!(relm, window, connect_delete_event(_, _), Quit);
  +        // There is also a `connect!()` macro for GTK+ events that does not need a value to be returned in the callback.
  +        window.show_all();
  +        let window = Win {
  +            window: window,
  +        };
  +        window
       }
   
       // The next methods are optional.
  
positive.code: 
  Messages are sent to both `Widget::update` and `Widget::update_command` to indicate that an event happened. The model can be updated when an event is received.
  
  Create a `struct` to contain the GTK+ widgets:
  
  [source,rust]
  ----
  struct Widgets {
      // …
      window: Window,
  }
  ----
  
  Create a `struct` which represents a `Widget` (in this case, the main window of the application):
  
  [source,rust]
  ----
  struct Win {
      widgets: Widgets,
  }
  ----
  
  
negative.code: 
      // Return the container of this widget.
      fn container(&self) -> &Self::Container {
          &self.window
      }
  
      // Return the initial model.
      fn model() -> Model {
          Model {
          }
      }
  
      // The model may be updated when a message is received.
  