code: public JPanel getPaneDisplay() {
  		if (paneDisplay == null) {
  			paneDisplay = new JPanel();
  			paneDisplay.setLayout(new CardLayout());
  			paneDisplay.setName("paneDisplay");
  			paneDisplay.add(getWorkbench(), getWorkbench().getName());
  		}
  		return paneDisplay;
  	}
docs: This method initializes paneDisplay
  
  @return JPanel