abstract sclass DynFullscreen > DynModule {
  transient JFrame fullScreenFrame;
  
  void goFullscreen enter {
    if (fullScreenFrame != null) ret with activateFrame(fullScreenFrame);
    fullScreenFrame = showFullScreen(fullscreenVisualize());
    onFrameClose(fullScreenFrame, r { fullScreenFrame = null; });
  }
  
  JComponent fullscreenVisualize() { null; }
  
  void exitFullscreen enter {
    disposeFrame(fullScreenFrame);
  }
}