public Enum<?> implicitlyBoundedEnum(Enum<?> e) {
      return isSubtype(e);
    }

    @TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)
    public Enum<?> explicitlyBoundedEnumIsSubtypeOfImplicitlyBoundedEnum(
        Enum<? extends Enum<?>> obj) {
      return isSubtype(obj);
    }

    @TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)