private synchronized void createFocusingMouseListener() {
		if (focusingMouseListener == null) {
			focusingMouseListener = new FocusingMouseListener();
		}
	}
Remove the {@link AddressSetDisplayListener} from the listing panel

@param listener the listener to remove
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/codebrowser/CodeViewerProvider.java