code: public CLDR.Locale resolve(String languageTag) {
      MetaLocale meta = MetaLocale.fromLanguageTag(languageTag);
      return resolve(meta);
    }
docs: Resolve a, possibly incomplete, language tag into an expanded
  CLDR locale. This performs the "add likely subtags" operation.
  http://www.unicode.org/reports/tr35/tr35.html#Likely_Subtags