@Experimental
@Immutable
@Provider
public interface Node {

    /**
     * @return artifact for this node
     */
    @Nullable
    Artifact getArtifact();

    /**
     * @return dependency for this node
     */
    @Nullable
    Dependency getDependency();

    /**
     * Gets the child nodes of this node.
     *
     * @return the child nodes of this node, never {@code null}
     */
    @Nonnull

    if (obj == this) {
      return true;
    }
    if (!(obj instanceof ElementOrder)) {
      return false;
    }

    ElementOrder<?> other = (ElementOrder<?>) obj;
    return (type == other.type) && Objects.equals(comparator, other.comparator);
  }

  @Override
  public int hashCode() {
    return Objects.hash(type, comparator);
  }

  @Override

    if (obj == this) {
      return true;
    }
    if (!(obj instanceof ElementOrder)) {
      return false;
    }

    ElementOrder<?> other = (ElementOrder<?>) obj;
    return (type == other.type) && Objects.equals(comparator, other.comparator);
  }

  @Override
  public int hashCode() {
    return Objects.hash(type, comparator);
  }

  @Override

  public Stats xStats() {
    return xStats.snapshot();
  }

  /** Returns an immutable snapshot of the statistics on the {@code y} values alone. */
  public Stats yStats() {
    return yStats.snapshot();
  }

  /**
   * Returns the population covariance of the values. The count must be non-zero.
   *
   * <p>This is guaranteed to return zero if the dataset contains a single pair of finite values. It

      self.setCount(element, newCount);
      return true;
    } else {
      return false;
    }
  }

  static <E extends @Nullable Object> Iterator<E> elementIterator(
      Iterator<Entry<E>> entryIterator) {
    return new TransformedIterator<Entry<E>, E>(entryIterator) {
      @Override
      @ParametricNullness
      E transform(Entry<E> entry) {
        return entry.getElement();
      }
    };
  }

        }
        if (targetClassLoader != null) {
            return targetClassLoader;
        }
        if (thisClassLoader != null) {
            return thisClassLoader;
        }

        final ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader();
        if (systemClassLoader != null) {
            return systemClassLoader;
        }

         * @return The {@link ArtifactCoordinates} of the artifact.
         */
        ArtifactCoordinates getCoordinates();

        /**
         * Returns the resolved artifact.
         *
         * @return The {@link DownloadedArtifact} instance.
         */
        DownloadedArtifact getArtifact();

        /**
         * Returns a mapping of repositories to the exceptions encountered while resolving the artifact.

     * @param locale the locale
     * @return the converted {@link Date}
     */
    protected static Date toDate(final Object src, final String pattern, final Locale locale) {
        if (src == null) {
            return null;
        }
        if (src.getClass() == Date.class) {
            return (Date) src;
        }
        if (src instanceof Date) {
            return new Date(((Date) src).getTime());
        }

	if S3KMS.IsEncrypted(metadata) {
		return S3KMS, true
	}
	if S3.IsEncrypted(metadata) {
		return S3, true
	}
	if SSEC.IsEncrypted(metadata) {
		return SSEC, true
	}
	if IsMultiPart(metadata) {
		return nil, true
	}
	if _, ok := metadata[MetaIV]; ok {
		return nil, true
	}
	if _, ok := metadata[MetaAlgorithm]; ok {
		return nil, true
	}
	if _, ok := metadata[MetaKeyID]; ok {

  }
}

/** Returns the Content-Length as reported by the response headers. */
internal fun Response.headersContentLength(): Long = headers["Content-Length"]?.toLongOrDefault(-1L) ?: -1L

/** Returns an immutable wrap of this. */
@Suppress("NOTHING_TO_INLINE")
internal inline fun <T> List<T>.unmodifiable(): List<T> = Collections.unmodifiableList(this)

/** Returns an immutable wrap of this. */