code: public static LongStream rangeValues(Collection<Protos.Resource> resources) {
  		checkNotNull(resources);
  		return resources.stream()
  			.filter(Protos.Resource::hasRanges)
  			.flatMap(r -> r.getRanges().getRangeList().stream())
  			.flatMapToLong(Utils::rangeValues);
  	}
docs: Gets a stream of values from a collection of range resources.