static <T> Optional<T> withType() {
    return (Optional<T>) INSTANCE;
  }

  private Absent() {}

  @Override
  public boolean isPresent() {
    return false;
  }

  @Override
  public T get() {
    throw new IllegalStateException("Optional.get() cannot be called on an absent value");
  }

  @Override
  public T or(T defaultValue) {

      return true;
    }
    if (object instanceof NullsFirstOrdering) {
      NullsFirstOrdering<?> that = (NullsFirstOrdering<?>) object;
      return this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return ordering.hashCode() ^ 957692532; // meaningless
  }

  @Override
  public String toString() {
    return ordering + ".nullsFirst()";
  }

         */
        Throwable error) {

    /**
     * Determines if the request was processed successfully.
     *
     * @return true if no error occurred during processing (error is null), false otherwise
     */
    public boolean isSuccess() {
        return error == null;
    }

{* ../../docs_src/header_param_models/tutorial003_an_py310.py hl[19] *}

/// warning | Внимание

Перед тем как устанавливать для параметра `convert_underscores` значение `False`, имейте в виду, что некоторые HTTP-прокси и серверы не разрешают использовать заголовки с символами подчеркивания.

///

## Резюме

     */
    <T> T getComponent(String name);

    /**
     * Checks if the crawler container is available.
     *
     * @return true if the crawler container is available, false otherwise.
     */
    boolean available();

    /**
     * Cleans up resources and performs any necessary finalization tasks
     * before the object is destroyed. This method should be called to

    Object newValue = new Object();

    // no entry
    assertEquals(0, segment.count);
    assertNull(segment.put(key, hash, oldValue, false));
    assertEquals(1, segment.count);

    // same key
    assertSame(oldValue, segment.put(key, hash, newValue, false));
    assertEquals(1, segment.count);
    assertSame(newValue, segment.get(key, hash));

    // cleared

    Object newValue = new Object();

    // no entry
    assertEquals(0, segment.count);
    assertNull(segment.put(key, hash, oldValue, false));
    assertEquals(1, segment.count);

    // same key
    assertSame(oldValue, segment.put(key, hash, newValue, false));
    assertEquals(1, segment.count);
    assertSame(newValue, segment.get(key, hash));

    // cleared

        DoubleArrayAsList that = (DoubleArrayAsList) object;
        int size = size();
        if (that.size() != size) {
          return false;
        }
        for (int i = 0; i < size; i++) {
          if (array[start + i] != that.array[that.start + i]) {
            return false;
          }
        }
        return true;
      }
      return super.equals(object);
    }

    @Override

      }
      return false;
    }

    @Override
    public boolean remove(@Nullable Object o) {
      Map<K, V> delegate = delegateOrNull();
      if (delegate != null) {
        return delegate.entrySet().remove(o);
      } else if (o instanceof Entry) {
        Entry<?, ?> entry = (Entry<?, ?>) o;
        if (needsAllocArrays()) {
          return false;
        }

        Configuration config = context.getConfig();
        this.maxChannels = getMaxChannelsFromConfig(config);
        this.channelCounter = new AtomicInteger(0);
        this.multiChannelEnabled = false;

        // Schedule periodic health checks
        scheduler.scheduleAtFixedRate(this::performHealthCheck, 10, 10, TimeUnit.SECONDS);

        // Schedule interface discovery