@Override
		public void actionPerformed(ActionEvent e) {
			for (ActionListener listener : actionListeners) {
				listener.actionPerformed(e);
			}
		}
Listener on the editor's JTextField that then calls any registered action
listener on this combobox
Ghidra/Framework/Docking/src/main/java/docking/widgets/combobox/GhidraComboBox.java