expected.addAll(asList(elements));
    expectContents(expected);
  }

  protected final void expectAdded(int index, E... elements) {
    expectAdded(index, asList(elements));
  }

  protected final void expectAdded(int index, Collection<E> elements) {
    List<E> expected = copyToList(getSampleElements());
    expected.addAll(index, elements);
    expectContents(expected);
  }

            duplicateHostList = new ArrayList<>();
        }
        try {
            final DuplicateHostService duplicateHostService = ComponentUtil.getComponent(DuplicateHostService.class);
            duplicateHostList.addAll(duplicateHostService.getDuplicateHostList());
        } catch (final AutoBindingFailureException e) {
            logger.warn("DuplicateHostService is not found.", e);
        }
    }

    /**

      }

      // the regular values should be visible after filtering
      List<@Nullable Object> allEntries = new ArrayList<>();
      allEntries.addAll(extremeValues);
      allEntries.addAll(normalValues);
      SortedSet<E> set = delegate.create(allEntries.toArray());

      return createSubSet(set, firstExclusive, lastExclusive);
    }

     *
     * @param c the collection to copy from
     */
    public CaseInsensitiveSet(final Collection<String> c) {
        map = new CaseInsensitiveMap<>(Math.max((int) (c.size() / .75f) + 1, 16));
        addAll(c);
    }

    /**
     * Creates a {@link CaseInsensitiveSet}.
     *
     * @param initialCapacity the initial capacity
     */
    public CaseInsensitiveSet(final int initialCapacity) {

    add(element, 1);
    return true;
  }

  /**
   * A sensible definition of {@link #addAll(Collection)} in terms of {@link #add(Object)} and
   * {@link #add(Object, int)}. If you override either of these methods, you may wish to override
   * {@link #addAll(Collection)} to forward to this implementation.
   *
   * @since 7.0
   */
  @Override

 * to the methods of the delegate. For example, overriding {@link #add} alone <i>will not</i> change
 * the behavior of {@link #addAll}, which can lead to unexpected behavior. In this case, you should
 * override {@code addAll} as well, either providing your own implementation, or delegating to the
 * provided {@code standardAddAll} method.
 *

    }

    /**
     * Adds an authentication chain to the manager.
     * @param chain The authentication chain to add.
     */
    public void addChain(final AuthenticationChain chain) {
        chains = ArrayUtils.addAll(chains, chain);
    }

    /**
     * Returns a stream of authentication chains.
     * @return A stream wrapper of the authentication chains.
     */
    protected StreamOf<AuthenticationChain> chains() {

     */
    public void addUrl(final RequestData url) {
        childUrlSet.add(url);
    }

    /**
     * Add child URLs.
     * @param c the collection of request data to add to the child URL set
     */
    public void addAllUrl(final Collection<RequestData> c) {
        if (c != null) {
            childUrlSet.addAll(c);
        }
    }

    /**

    checkConflict("absent", absentFeatures, "present", morePresentFeatures, source);
    checkConflict("present", presentFeatures, "absent", moreAbsentFeatures, source);
    presentFeatures.addAll(morePresentFeatures);
    absentFeatures.addAll(moreAbsentFeatures);
    return requirements;
  }

  // Used by incorporateRequirements() only
  private static void checkConflict(
      String earlierRequirement,

      return standardEquals(object);
    }

    @Override
    public int hashCode() {
      return standardHashCode();
    }

    @Override
    public boolean addAll(Collection<? extends T> collection) {
      return standardAddAll(collection);
    }

    @Override
    public void clear() {
      standardClear();
    }

    @Override