docs: public static <T> T getBundle(final Class<T> type) {
          return doPrivileged(new PrivilegedAction<T>() {
              public T run() {
                  final Locale locale = Locale.getDefault();
                  final String lang = locale.getLanguage();
                  final String country = locale.getCountry();
                  final String variant = locale.getVariant();
  
                  Class<? extends T> bundleClass = null;
                  if (variant != null && !variant.isEmpty()) try {
                      bundleClass = Class.forName(join(type.getName(), "$bundle", lang, country, variant), true, type.getClassLoader()).asSubclass(type);
                  } catch (ClassNotFoundException e) {
                      // ignore
                  }
                  if (bundleClass == null && country != null && !country.isEmpty()) try {
                      bundleClass = Class.forName(join(type.getName(), "$bundle", lang, country, null), true, type.getClassLoader()).asSubclass(type);
                  } catch (ClassNotFoundException e) {
                      // ignore
                  }
                  if (bundleClass == null && lang != null && !lang.isEmpty()) try {
                      bundleClass = Class.forName(join(type.getName(), "$bundle", lang, null, null), true, type.getClassLoader()).asSubclass(type);
                  } catch (ClassNotFoundException e) {
                      // ignore
                  }
                  if (bundleClass == null) try {
                      bundleClass = Class.forName(join(type.getName(), "$bundle", null, null, null), true, type.getClassLoader()).asSubclass(type);
                  } catch (ClassNotFoundException e) {
                      throw new IllegalArgumentException("Invalid bundle " + type + " (implementation not found)");
                  }
                  final Field field;
                  try {
                      field = bundleClass.getField("INSTANCE");
                  } catch (NoSuchFieldException e) {
                      throw new IllegalArgumentException("Bundle implementation " + bundleClass + " has no instance field");
                  }
                  try {
                      return type.cast(field.get(null));
                  } catch (IllegalAccessException e) {
                      throw new IllegalArgumentException("Bundle implementation " + bundleClass + " could not be instantiated", e);
                  }
              }
          });
      }