docs: public static void setPreferredAttributeValuesForTrafficDirection(TrafficDirection direction, List<String> values) {
  		int i = 0;
  		for (final String value : values) {
  			setPreferredAttributeValueForTrafficDirection(direction, i, value);
  			++i;
  		}
  		setPreferredAttributeValueForTrafficDirection(direction, i, null);
  	}