localeResolutionCallback method Null safety

Locale? localeResolutionCallback(
  1. Locale? locale,
  2. Iterable<Locale> supportedLocales
)

Callback for locale resolution

Implementation

static Locale? localeResolutionCallback(
    Locale? locale, Iterable<Locale> supportedLocales) {
  if (locale != null)
    for (var supportedLocale in supportedLocales)
      if (supportedLocale.languageCode == locale.languageCode) {
        if (locale.countryCode == null)
          return supportedLocale;
        else if (supportedLocale.countryCode == locale.countryCode)
          return supportedLocale;
      }
  return defaultLocale;
}