code: public static List<String> buildUris(Option<String> uris) {
  		if (uris.isEmpty()) {
  			return Collections.emptyList();
  		} else {
  			List<String> urisList = new ArrayList<>();
  			for (String uri : uris.get().split(",")) {
  				urisList.add(uri.trim());
  			}
  			return urisList;
  		}
  	}
docs: Build a list of URIs for providing custom artifacts to Mesos tasks.
  @param uris a comma delimited optional string listing artifact URIs