docs: private void initialize() {
  		this.setJMenuBar(getMainMenuBar());
  		this.setContentPane(getPaneContent());
      	this.setPreferredSize(new Dimension(1000, 800));
  		this.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
  		this.addWindowListener(new WindowAdapter() {
  			@Override
  			public void windowClosing(WindowEvent e) {
  				getMainMenuBar().getMenuFileControl().exit();
  			}
  		});
  
  		this.setVisible(false);
  	}