JPanel create() {
		JPanel outerPanel = new JPanel(new BorderLayout());
		outerPanel.getAccessibleContext().setAccessibleName("Annotation Handler");
		handlerComboBox = new GhidraComboBox<>(handlerList);
		handlerComboBox.getAccessibleContext().setAccessibleName("Combo Box");
		handlerComboBox.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent evt) {
				okCallback();
			}
		});
		outerPanel.add(handlerComboBox, BorderLayout.NORTH);
		return outerPanel;
	}
A simple dialog to select the language export type.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/actions/AnnotationHandlerDialog.java