String (final Set<String> data, final PropertyValue propertyValue) { final String ignoreString; if (data.size() == 1) { ignoreString = data.iterator().next(); } else { final StringBuilder sb = new StringBuilder(); for (final String name : data) { sb.append(name).append('\n'); } ignoreString = sb.toString(); } return (propertyValue == null) ? ignoreString : (PropertyValue.toString(propertyValue) + '\n' + ignoreString); }