Implementation
@override
String get displayResult {
final result = StringBuffer();
maybeAppendList(_names, result);
maybeAppendList(_nicknames, result);
maybeAppend(pronunciation, result);
maybeAppend(title, result);
maybeAppend(org, result);
maybeAppendList(_addresses, result);
maybeAppendList(_phoneNumbers, result);
maybeAppendList(_emails, result);
maybeAppend(instantMessenger, result);
maybeAppendList(_urls, result);
maybeAppend(birthday, result);
maybeAppendList(geo, result);
maybeAppend(note, result);
return result.toString();
}