When I right-click on the word "clone" and select Find Usages and then "Find," no results appear and the Find button 
stays disabled.

I have a snapshot of my code if anyone would like to see more details.

The clone method:
    protected Course clone ()
    {
        final Course c = new Course (myName);
        c.setOfferings ((ArrayList<? extends Section>) this.myOfferings.clone ());
        return c;
    }