toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'country_code': countryCode,
'name': name,
'english_name': englishName,
'flag_emoji': flagEmoji,
'is_hidden': isHidden,
'calling_codes': callingCodes.map((item) => item).toList(),
'@type': constructor,
};