docs: private void initializeLayout()
  	{
  		final GridBagLayout gbl = new GridBagLayout();
  		final GridBagConstraints gbc = new GridBagConstraints();
  		this.setLayout(gbl);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.CENTER, GridBagConstraints.BOTH,
  			new Insets(2, 2, 2, 2), 0, 0, GridBagConstraints.REMAINDER, 1, 0, 0, 1, 1,
  			textAreaDisplay, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 0, 1, 1, 1, 100, 100, button1, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 1, 1, 1, 1, 100, 100, button2, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 2, 1, 1, 1, 100, 100, button3, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 3, 1, 1, 1, 100, 100, buttonTable,
  			this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 0, 2, 1, 1, 100, 100, button4, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 1, 2, 1, 1, 100, 100, button5, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 2, 2, 1, 1, 100, 100, button6, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 3, 2, 1, 1, 100, 100, buttonCancel,
  			this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 0, 3, 1, 1, 100, 100, button7, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 1, 3, 1, 1, 100, 100, button8, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 2, 3, 1, 1, 100, 100, button9, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 3, 3, 1, 1, 100, 100, buttonStorno,
  			this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 0, 4, 1, 1, 100, 100, buttonPlus,
  			this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 1, 4, 1, 1, 100, 100, button0, this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 2, 4, 1, 1, 100, 100, buttonMinus,
  			this);
  
  		LayoutExtensions.addComponent(gbl, gbc, GridBagConstraints.NORTHWEST,
  			GridBagConstraints.BOTH, new Insets(2, 2, 2, 2), 3, 4, 1, 1, 100, 100, buttonEnter,
  			this);
  
  	}