toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (countryCode != null) 'countryCode': countryCode!,
if (countryDartId != null) 'countryDartId': countryDartId!,
if (dartId != null) 'dartId': dartId!,
if (kind != null) 'kind': kind!,
if (name != null) 'name': name!,
if (regionCode != null) 'regionCode': regionCode!,
};