code: public Map<String, String> getAll(String language) {
          Properties messages = getMessagesForLanguage(language);
          Map<String, String> map = new TreeMap<>();
          for (Map.Entry<Object, Object> entry : messages.entrySet()) {
              map.put(entry.getKey().toString(), entry.getValue().toString());
          }
  
          return map;
      }
docs: Returns all localized messages.
  <ol>
  <li>Exact locale match, return the registered locale messages
  <li>Language match but not a locale match, return the registered language
  messages
  <li>Return the default messages
  </ol>
  
  @param language
  @return all localized messages