docs: public void displayValidationError(final String message) {
          final StringBuilder updatedMsg = new StringBuilder(FontAwesome.EXCLAMATION_TRIANGLE.getHtml());
          updatedMsg.append(' ');
          updatedMsg.append(message);
          notificationMessage.showNotification(SPUIStyleDefinitions.SP_NOTIFICATION_ERROR_MESSAGE_STYLE, null,
                  updatedMsg.toString(), true);
      }