parseLocaleMap method Null safety

dynamic parseLocaleMap()

Parse the localeMap from the supportedLocales

Implementation

static parseLocaleMap() {
  localeMap = {};
  for (final locale in supportedLocales) {
    localeMap[locale.languageCode] ??= {};
    localeMap[locale.languageCode]![locale.countryCode ?? ''] = locale;
  }
}