return isSubtype(obj);
    }

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

    @TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)