code: public String dump() {
      StringBuilder buf = new StringBuilder();
      buf.append("            LOCALE        MATCHED BUNDLE\n");
      buf.append("            ======        ==============\n");
      List<MetaLocale> keys = availableBundlesMap.keySet().stream()
          .map(k -> (MetaLocale)k).collect(Collectors.toList()); 
      Collections.sort(keys);
      for (CLDR.Locale key : keys) {
        buf.append(String.format("%20s  ->  %s\n", key, availableBundlesMap.get(key)));
      }
      return buf.toString();
    }
docs: Inspect the mapping between permutations of locale fields and bundle identifiers.