code: private Map<String, String> getLocalIssueMap(Map<Locale, Map<String, String>> base, Locale locale) {
  
          Map<String, String> result = base.get(locale);
          if (result == null) {
              result = new HashMap<String, String>();
              base.put(locale, result);
          }
          return result;
      }
docs: Returns the localized issue map from the given base map.<p>
  
  If the base map does not contains an issue map for the given locale,
  a new map is added for the locale.<p>
  
  @param base the base issue map
  @param locale the locale to get the localized issue map for
  
  @return the localized issue map from the given base map