return notSubtype(obj);
    }

    @TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)
    public UseSerializableIterable<? extends CharSequence>
        partialExplicitTypeBoundIsNotSubtypeOfDifferentTypeBound(
            UseSerializableIterable<? extends Serializable> obj) {
      return notSubtype(obj);
    }
  }