Eclipse warning about synthetic accessor for private static nested classes in Java?

Question

My coworker suggested making several of the Eclipse code-formatting and warning settings to be more rigorous. The majority of these changes make sense, but I get this one we

Answer 1

By the way, the setting to turn the warning off is in the Java Errors/Warnings page under "Code style" and is called:

Access to a non-accessible member of an enclosing type