synchronized (PROTOCOL_HANDLERS) {
            if (Handler.factory != null) {
                throw new IllegalStateException("URLStreamHandlerFactory already set.");
            }
            PROTOCOL_HANDLERS.clear();
            Handler.factory = factory;
        }
    }

    /**
     * Returns the default HTTP port.
     *
     * @return An <code>int</code> containing the default HTTP port.
     */
    @Override

     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index(final SearchForm form) {
        validate(form, messages -> {}, this::asDictIndexHtml);
        protwordsPager.clear();
        return asHtml(path_AdminDictProtwords_AdminDictProtwordsJsp).renderWith(data -> {
            searchPaging(data, form);
        });
    }

    /**
     * Show the list page.

        try {
            final MessageDigest md4 = Crypto.getMD4();
            md4.update(Strings.getUNIBytes(tempStr));
            return md4.digest();
        } finally {
            // Clear the temporary string from memory (best effort)
            if (tempStr != null) {
                tempStr.intern();
            }
        }
    }

    /**

        // Modify input list - should not affect returned list
        inputList.clear();
        assertEquals(2, notifications.size());

        // Try to modify returned list - behavior depends on implementation
        // This tests that the implementation properly handles list modifications
        try {
            notifications.clear();
            // If this succeeds, the implementation allows modification

which is designed to persist between app restarts.

```kotlin
cache.delete()
```
 
## Pruning the Cache

Pruning the entire Cache to clear space temporarily can be done using evictAll.

```kotlin
cache.evictAll()
```

Removing individual items can be done using the urls iterator.

    throw up();
  }

  @Override
  public boolean retainAll(Collection<?> elementsToRetain) {
    throw up();
  }

  @Override
  public void clear() {
    throw up();
  }

  private static UnsupportedOperationException up() {
    throw new UnsupportedOperationException();
  }

    final Map<E, Integer> backingMap = new HashMap<>();

    @Override
    public int size() {
      return Multisets.linearTimeSizeImpl(this);
    }

    @Override
    public void clear() {
      throw new UnsupportedOperationException();
    }

    @Override
    public int count(@Nullable Object element) {
      for (Entry<E> entry : entrySet()) {

        ComponentUtil.fessConfig = fessConfig;
        if (fessConfig == null) {
            systemHelper = null;
            FessProp.propMap.clear();
            componentMap.clear();
        }
    }

    /**
     * Registers a component instance with a name.
     * @param instance The component instance to register.

    }

    @Override
    public void clear() {
      forwardList.clear();
    }

    @Override
    @ParametricNullness
    public T remove(int index) {
      return forwardList.remove(reverseIndex(index));
    }

    @Override
    protected void removeRange(int fromIndex, int toIndex) {
      subList(fromIndex, toIndex).clear();
    }

    @Override
    @ParametricNullness

                serverThread.join(5000); // Wait up to 5 seconds
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }

        registrations.clear();
        log.info("Mock witness service stopped");
    }

    /**
     * Get the address the service is listening on
     *
     * @return the service address