code: @Override
      public String formatMessage(Locale locale, Object ... params) {
          return Messages.message(message, locale, params);
      }
docs: Provides default implementation, will look for a property in resource bundle, using set message as key.
  If property in resource bundle not found, treats message verbatim.
  
  @param locale locale to use, or null for default locale.
  @param params parameters in case a message is parametrized.
  @return formatted message.