    @Test
    public void extendingClassScopedBundleKeyInterface() {

        List<C10NUnit> units = checker.inspect(testMsgPackage);
        checkUnit(units,
                SubInterfaceOfClassScopedKey.class, "sub_both",
                customKey("scope.subclass.sub_both", null),
                bundleTr(ENGLISH, "[en]@bundle SubInterfaceOfClassScopedKey.sub_both"),
                bundleTr(JAPANESE, "[ja]@bundle SubInterfaceOfClassScopedKey.sub_both"));
    }