CountryInfo.fromJson constructor
Parse from a json
Implementation
factory CountryInfo.fromJson(Map<String, dynamic> json) => CountryInfo(
countryCode: json['country_code'],
name: json['name'],
englishName: json['english_name'],
isHidden: json['is_hidden'],
callingCodes: List<String>.from(
(json['calling_codes'] ?? []).map((item) => item).toList()),
);