load method
Start loading the resources for locale. The returned future completes
when the resources have finished loading.
It's assumed that this method will return an object that contains a collection of related string resources (typically defined with one method per resource). The object will be retrieved with Localizations.of.
Implementation
@override
Future<ActiveLocalization> load(Locale locale) async {
final localization = ActiveLocalization(
locale,
loader: loader,
bundle: bundle,
assetPath: assetPath,
fallbackLocale: fallbackLocale,
);
await localization.load();
return localization;
}