public void takeListeners(ToolOptions oldOptions) {
		listeners = oldOptions.listeners;
		oldOptions.listeners = null;
	}
Add the options change listener. NOTE: The Options uses
WeakReferences to manage the listeners; this means that you must supply a
listener and maintain a handle to it, or else the listener will be
garbage collected and will never get called. So for this reason, do
<i>not</i> create the listener in an anonymous inner class.
@param l listener to add
Ghidra/Framework/Gui/src/main/java/ghidra/framework/options/ToolOptions.java