load method
Implementation
Future<bool> load() async {
var jsonString = await rootBundle.loadString(
'packages/$kPackageName/widget_locale/${locale.languageCode}.json',
cache: false,
);
Map<String, dynamic> jsonMap = jsonDecode(jsonString);
_localizedStrings = jsonMap.map((key, value) => MapEntry(key, '$value'));
return true;
}