private static String foo;
    }

    public static class InnerPublicStaticClass extends RuleSource {
    }

    public static class HasExplicitDefaultConstructor extends RuleSource {
        public HasExplicitDefaultConstructor() {
        }
    }

    public static class HasStaticFinalField extends RuleSource {
        private static final Object VALUE = null;
    }

        extractor.extract(type)

        then:
        noExceptionThrown()

        where:
        type << [
                OuterClass.InnerPublicStaticClass,
                OuterClass.HasExplicitDefaultConstructor,
                OuterClass.HasStaticFinalField
        ]
    }