message: Explicit virtual override specifiers
diff: @@ -8,11 +8,11 @@ public:
  MainMenuOptions();
  virtual ~MainMenuOptions();
  - virtual void update();
  + virtual void update() override;
  protected:
  virtual void init();
  - void visibilityChanged(bool visible) override;
  + virtual void visibilityChanged(bool visible) override;
  private:
  void onKeyDown(NAS2D::EventHandler::KeyCode key, NAS2D::EventHandler::KeyModifier mod, bool repeat);
  