toLocaleList method
Transforms a List of Localizations into a List of Locales.
Usually used on MaterialApp's supportedLocales:
return MaterialApp(
  title: loc.appName,
  // Add this line so the platform knows the supported languages
  supportedLocales: Localization.localizations.toLocaleList(),
  theme: ...,
  home: Home(),
);
Implementation
List<Locale> toLocaleList() => map((e) => e.toLocale()).toList();