@Override
		public void changedUpdate(DocumentEvent e) {
			for (DocumentListener listener : docListeners) {
				listener.changedUpdate(e);
			}
		}
Listener on the editor's JTextField's document that then calls any registered document
listener on this combobox
Ghidra/Framework/Docking/src/main/java/docking/widgets/combobox/GhidraComboBox.java