> + public StreamOptions nextStreamOptions() {
> + return StreamOptions.class.cast(nextMarker().get());
> + }
> +
> + @Override
> + public Optional<Object> nextMarker() {
> + for (Link link: getLinks()) {
> + if (Link.Relation.NEXT == link.getRelation()) {
> + return Optional.of(toListOptions(link));
> + }
> + }
> +
> + return Optional.absent();
> + }
> +
> + private Object toListOptions(Link link) {
Use narrower return type?
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