public void noParameter() {}

    @Keep
    void primitiveAndNullable(@Nullable String s, int i) {}
  }

  static class FactoryMethodReturnsNullButNotAnnotated {
    private FactoryMethodReturnsNullButNotAnnotated() {}

    static FactoryMethodReturnsNullButNotAnnotated returnsNull() {
      return null;
    }
  }

  static class FactoryMethodReturnsNullAndAnnotated {