code: public List<String> asMulti() {
  		if (values.isEmpty()) {
  			return Collections.emptyList();
  		}
  
  		List<String> multi = new ArrayList<String>(values.size());
  		for (JsonValue value : values) {
  			if (value.isNull()) {
  				multi.add("");
  				continue;
  			}
  
  			Object obj = value.getValue();
  			if (obj != null) {
  				multi.add(obj.toString());
  				continue;
  			}
  		}
  		return multi;
  	}
docs: Parses this jCal value as a multi-valued property value.
  @return the values or empty list if not found