public Collection<String> create(String[] elements) {
                // TODO: MinimalCollection should perhaps throw
                for (Object element : elements) {
                  if (element == null) {
                    throw new NullPointerException();
                  }
                }
                return MinimalCollection.of(elements);
              }
            })

              protected List<String> create(final String[] elements) {
                return new AbstractList<String>() {
                  @Override
                  public int size() {
                    return elements.length;
                  }

                  @Override
                  public String get(int index) {
                    return elements[index];
                  }
                };

        throw PermittedMetaException.ISE;
      }
    }

    private List<E> getElements() {
      List<E> elements = new ArrayList<>();
      Helpers.addAll(elements, previousElements);
      Helpers.addAll(elements, Helpers.reverse(nextElements));
      return elements;
    }
  }

  public enum KnownOrder {
    KNOWN_ORDER,
    UNKNOWN_ORDER
  }

    return new Unhashables();
  }

  @Override
  public T create(Object... elements) {
    UnhashableObject[] array = createArray(elements.length);
    int i = 0;
    for (Object e : elements) {
      array[i++] = (UnhashableObject) e;
    }
    return create(array);
  }

  /**
   * Creates a new collection containing the given elements; implement this method instead of {@link
   * #create(Object...)}.
   */

      @Override
      boolean hashFloodingDetected(Object[] hashTable) {
        int maxRunBeforeFallback = maxRunBeforeFallback(hashTable.length);
        int mask = hashTable.length - 1;

        // Invariant: all elements at indices in [knownRunStart, knownRunEnd) are nonnull.
        // If knownRunStart == knownRunEnd, this is vacuously true.
        // When knownRunEnd exceeds hashTable.length, it "wraps", detecting runs around the end

  }

  /**
   * Adds the given element to this queue. If this queue has a maximum size, after adding {@code
   * element} the queue will automatically evict its greatest element (according to its comparator),
   * which may be {@code element} itself.
   *
   * @return {@code true} always
   */
  @CanIgnoreReturnValue
  @Override
  public boolean add(E element) {
    offer(element);
    return true;
  }

     * 
     * @param delimiter
     * @param elements
     * @return elements separated by delimiter
     */
    public static String join ( CharSequence delimiter, CharSequence... elements ) {
        StringBuilder sb = new StringBuilder();
        for ( CharSequence element : elements ) {
            if ( sb.length() > 0 ) {
                if ( delimiter != null ) {

    @Override
    protected List<String> create(String[] elements) {
      ImmutableSortedMap.Builder<String, Integer> builder = ImmutableSortedMap.naturalOrder();
      for (int i = 0; i < elements.length; i++) {
        builder.put(elements[i], i);
      }
      return builder.build().keySet().asList();
    }

    @Override

  /**
   * Indicates that a collection disallows certain elements (other than {@code null}, whose validity
   * as an element is indicated by the presence or absence of {@link #ALLOWS_NULL_VALUES}). From the
   * documentation for {@link Collection}:
   *
   * <blockquote>
   *
   * "Some collection implementations have restrictions on the elements that they may contain. For

        final Object array = Array.newInstance(toType.getRawType(), collection.size());

        int i = 0;
        for (final Object element : collection) {
            Array.set(array, i++, element);
        }

        return array;
    }

    /**
     * Parses a sequence of XML elements and converts them to the appropriate bean type.
     *
     * @param parser The XML parser
     * @return Converted bean instance