fromJsonStringMapIsoUnique static method
Special case for ISO codes that should be unique for all languages.
e.g. "country_code_2": {"en": "BY"} will return 'BY'.
From a Map<String, String>
in dynamic
's clothing (JsonKey annotation)
Implementation
static String? fromJsonStringMapIsoUnique(dynamic map) {
if (map == null) {
return null;
}
if (map is! Map<String, dynamic>) {
throw Exception('Expected type: Map<String, String>');
}
for (final value in map.values) {
return value! as String;
}
return null;
}