MethodsRemovedInInternalSuperClassRule rule

    static class OldSuperInternal {
        void publicMethod() {}

        private void privateMethod() {}

        OldSuperInternal returnTypeOverridenMethod() { return null }
    }

    static class OldBase extends OldSuperInternal {
        void anotherPublicMethod() {}

        OldBase returnTypeOverridenMethod() { return null }
    }