I've tried to move an inner class to outer level (refactoring action), the class contains a switch() on enum-type expression.
The case constants become qualified after the refactor, i.e.

        switch (kind) {
            case IntroduceKind.CREATE_CONSTANT:
                return "IntroduceConstant"; //NOI18N
            case IntroduceKind.CREATE_VARIABLE:
                return "IntroduceVariable"; //NOI18N
            default:
                throw new IllegalStateException();
        }
    }

which is an error. The referenced enum is a public toplevel class in the same package.

(for reproduction: I've tried to move org.netbeans.modules.java.hints.introduce.IntroduceHint.IntroduceFix to package-level)