protected void addOKButton() {
		okButton = new JButton("OK");
		okButton.setMnemonic('K');
		okButton.setName("OK");
		okButton.getAccessibleContext().setAccessibleName("OK");
		okButton.addActionListener(e -> okCallback());
		addButton(okButton);
	}
Adds an "OK" button to the button panel.  The protected method
okCallback() will be invoked whenever the "OK" button is pressed.
Ghidra/Framework/Docking/src/main/java/docking/DialogComponentProvider.java