var canceled = false

    override val source: BufferedSource =
      object : ForwardingSource(delegate.source) {
        override fun close() {
          sourceClosed = true
          super.close()
        }
      }.buffer()

    override val sink: BufferedSink =
      object : ForwardingSink(delegate.sink) {
        override fun close() {
          sinkClosed = true
          super.close()
        }

* ✏️ Fix typo in `docs/ru/docs/index.md`. PR [#10672](https://github.com/tiangolo/fastapi/pull/10672) by [@Delitel-WEB](https://github.com/Delitel-WEB).
* ✏️ Fix typos in `docs/zh/docs/tutorial/extra-data-types.md`. PR [#10727](https://github.com/tiangolo/fastapi/pull/10727) by [@HiemalBeryl](https://github.com/HiemalBeryl).

  @Override
  public boolean containsKey(@Nullable Object key) {
    Map<K, V> delegate = delegateOrNull();
    return (delegate != null) ? delegate.containsKey(key) : indexOf(key) != -1;
  }

  @Override
  public @Nullable V get(@Nullable Object key) {
    Map<K, V> delegate = delegateOrNull();
    if (delegate != null) {
      return delegate.get(key);
    }
    int index = indexOf(key);
    if (index == -1) {

    // Test execute with successful purge (single file deleted)
    public void test_execute_singleFileDeleted() {
        thumbnailManager.setPurgeCallCount(1);

        String result = purgeThumbnailJob.execute();

        assertEquals("Deleted 1 thumbnail files.", result);
    }

    // Test execute with successful purge (multiple files deleted)
    public void test_execute_multipleFilesDeleted() {

					if len(l.lockMap) != locks {
						t.Fatalf("objects deleted, want %d != got %d", locks, len(l.lockMap))
					}
					if len(l.lockUID) != locks*readers {
						t.Fatalf("objects deleted, want %d != got %d", locks*readers, len(l.lockUID))
					}

					// Expire 50%
					expired := time.Now().Add(-time.Hour * 2)

    this(new TreeMap<K, V>(map));
  }

  private SafeTreeMap(NavigableMap<K, V> delegate) {
    this.delegate = delegate;
    if (delegate == null) {
      throw new NullPointerException();
    }
    for (K k : keySet()) {
      checkValid(k);
    }
  }

  @Override
  public @Nullable Entry<K, V> ceilingEntry(K key) {
    return delegate.ceilingEntry(checkValid(key));
  }

  @Override

    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index() {
        saveToken();
        return asHtml(path_AdminSuggest_AdminSuggestJsp).useForm(SuggestForm.class);
    }

    /**
     * Deletes all suggest words from the suggest index.
     *
     * @return HTML response redirecting to the index page
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse deleteAllWords() {

   */
  @Override
  protected long edgeCount() {
    return delegate().edges().size();
  }

  @Override
  public boolean isDirected() {
    return delegate().isDirected();
  }

  @Override
  public boolean allowsSelfLoops() {
    return delegate().allowsSelfLoops();
  }

  @Override
  public ElementOrder<N> nodeOrder() {
    return delegate().nodeOrder();
  }

  @Override

  @Override
  protected abstract Deque<E> delegate();

  @Override
  public void addFirst(@ParametricNullness E e) {
    delegate().addFirst(e);
  }

  @Override
  public void addLast(@ParametricNullness E e) {
    delegate().addLast(e);
  }

  @Override
  public Iterator<E> descendingIterator() {
    return delegate().descendingIterator();
  }

  @Override
  @ParametricNullness

          @Override
          public NoDelegateToEquals apply(Equals delegate) {
            return new NoDelegateToEquals(delegate);
          }
        };

    private final Equals delegate;

    NoDelegateToEquals(Equals delegate) {
      this.delegate = delegate;
    }

    @Override
    public String toString() {
      return delegate.toString();
    }
  }