@Override
		public void keyPressed(KeyEvent e) {
			for (KeyListener listener : keyListeners) {
				listener.keyPressed(e);
			}
		}
Listener on the editor's JTextField that then calls any registered editor key
listener on this combobox
Ghidra/Framework/Docking/src/main/java/docking/widgets/combobox/GhidraComboBox.java