code: public static List<ContentCodingType> parseCodingTypes(String codingTypes) {
  		if (!StringUtils.hasLength(codingTypes)) {
  			return Collections.emptyList();
  		}
  		String[] tokens = codingTypes.split(",");
  		List<ContentCodingType> result = new ArrayList<ContentCodingType>(tokens.length);
  		for (String token : tokens) {
  			result.add(parseCodingType(token));
  		}
  		return result;
  	}
docs: Parse the given, comma-separated string into a list of {@code ContentCodingType} objects.
  <p>
  This method can be used to parse an Accept-Encoding.
  @param codingTypes the string to parse
  @return the list of content coding types
  @throws IllegalArgumentException if the string cannot be parsed