docs: private JButton getBtnClose() {
  		if (btnClose == null) {
  			btnClose = new JButton();
  			btnClose.setText("Close");
  			btnClose.setVisible(false);
  			btnClose.addActionListener(new ActionListener() {     // Close this window
  				@Override
  				public void actionPerformed(ActionEvent arg0) {					
  				        
                        stop();
                        
  				}
  		    });
  		}
  		return btnClose;
  	}