* <p>
 * A type can be marked {@link Consumer} or {@link Provider} but not both. A type is assumed to be
 * {@link Consumer} if it is not marked either {@link Consumer} or {@link Provider}.
 * <p>
 * A package can be marked {@link Consumer}. In this case, all types in the package are considered
 * to be a provider type regardless of whether they are marked {@link Consumer} or {@link Provider}.
 *
 * @see Provider
 * @since 4.0.0

        private final TransferEvent event;

        private Exchange(TransferEvent event) {
            this.event = event;
        }

        public void process(Consumer<TransferEvent> consumer) {
            consumer.accept(event);
        }

        public void waitForProcessed() throws InterruptedException {
            // nothing, is async
        }
    }

            }
            for (Artifact consumer : consumers) {
                result.remove(consumer);
                result.add(new DefaultArtifact(
                        consumer.getGroupId(),
                        consumer.getArtifactId(),
                        "",
                        consumer.getExtension(),
                        consumer.getVersion(),
                        consumer.getProperties(),

     * consumer project.
     * <p>
     * Note: This property is about "build path", whatever it means in the scope of the consumer project. It is NOT
     * about Java classpath or anything alike. How artifact is being consumed depends heavily on the consumer project.
     * Resolver is and will remain agnostic of consumer project use cases.
     */

          GeneralSpliterator<E> spliterator, Consumer<? super E> consumer) {
        spliterator.forEachRemaining(consumer);
      }
    },
    NO_SPLIT_TRY_ADVANCE {
      @Override
      <E extends @Nullable Object> void forEach(
          GeneralSpliterator<E> spliterator, Consumer<? super E> consumer) {
        while (spliterator.tryAdvance(consumer)) {
          // do nothing
        }
      }
    },

          GeneralSpliterator<E> spliterator, Consumer<? super E> consumer) {
        spliterator.forEachRemaining(consumer);
      }
    },
    NO_SPLIT_TRY_ADVANCE {
      @Override
      <E extends @Nullable Object> void forEach(
          GeneralSpliterator<E> spliterator, Consumer<? super E> consumer) {
        while (spliterator.tryAdvance(consumer)) {
          // do nothing
        }
      }
    },

 * <p>
 * A type can be marked {@link Consumer} or {@link Provider} but not both. A type is assumed to be
 * {@link Consumer} if it is not marked either {@link Consumer} or {@link Provider}.
 * <p>
 * A package can be marked {@link Provider}. In this case, all types in the package are considered
 * to be a provider type regardless of whether they are marked {@link Consumer} or {@link Provider}.
 *
 * @see Consumer
 * @since 4.0.0

    return CollectSpliterators.indexed(size(), SPLITERATOR_CHARACTERISTICS, this::get);
  }

  @Override
  public void forEach(Consumer<? super E> consumer) {
    checkNotNull(consumer);
    int n = size();
    for (int i = 0; i < n; i++) {
      consumer.accept(get(i));
    }
  }

  @Override
  @GwtIncompatible
  int copyIntoArray(@Nullable Object[] dst, int offset) {

    }

    public Promise then(final Consumer<RESPONSE> consumer) {
        return promise.then(consumer);
    }

    public Promise error(final Consumer<Throwable> consumer) {
        return promise.error(consumer);
    }

    public Promise promise() {
        return promise;
    }

    public class Promise {
        public Promise then(final Consumer<RESPONSE> consumer) {

        return singleton(name, cls, initializer, (Consumer<T>) null);
    }

    public <T> StandardCrawlerContainer singleton(final String name, final Class<T> cls) {
        return singleton(name, cls, (Consumer<T>) null, (Consumer<T>) null);
    }