docs: private ResourceBundle loadBundle() {
          String pkg = clazz.getPackage().getName();
          Locale locale = getLocale();
          return PropertyResourceBundle.getBundle(pkg + ".messages", locale, clazz.getClassLoader(), new ResourceBundle.Control() { //$NON-NLS-1$
              @Override
              public List<String> getFormats(String baseName) {
                  return FORMATS;
              }
          });
      }