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 Ints();
  }

  @Override
  public Set<Integer> create(Object... elements) {
    Integer[] array = new Integer[elements.length];
    int i = 0;
    for (Object e : elements) {
      array[i++] = (Integer) e;
    }
    return create(array);
  }

  protected abstract Set<Integer> create(Integer[] elements);

  @Override
  public Integer[] createArray(int length) {
    return new Integer[length];

        final EnumerationIterator<String> itr = new EnumerationIterator<String>(vector.elements());
        itr.remove();
    }

    /**
     * @throws Exception
     */
    @Test
    public void testNext() throws Exception {
        final EnumerationIterator<String> itr = new EnumerationIterator<String>(new Vector<String>().elements());
        assertThat(itr.hasNext(), is(not(true)));
    }

    /**

  }

  @Override
  public T create(Object... elements) {
    return generator.create(elements);
  }

  @Override
  public E[] createArray(int length) {
    return generator.createArray(length);
  }

  @Override
  public T createTestSubject() {
    Collection<E> elements = getSampleElements(getCollectionSize().getNumElements());
    return generator.create(elements.toArray());
  }

  @Override

    assertEquals("Should have removed an element", 2, list.size());
    assertFalse("Second element should be gone", list.contains("B"));
  }

  static class ThrowsAtEndException extends RuntimeException {
    /* nothing */
  }

  /**
   * This Iterator claims to have more elements than the underlying iterable, but when you try to
   * fetch the extra elements, it throws an unchecked exception.
   */

              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);
              }
            })

 * both {@link Collection} and {@link Map}; since there isn't an established collective noun that
 * encompasses both of these, 'container' is used.
 *
 * @author George van den Driessche
 */
@GwtCompatible
@NullMarked
public interface TestContainerGenerator<T, E extends @Nullable Object> {
  /** Returns the sample elements that this generate populates its container with. */

        multimap.putAll("foo", asList(7, 8));
        return multimap.get("foo").iterator();
      }

      @Override
      protected void verify(List<Integer> elements) {
        assertEquals(new HashSet<>(elements), multimap.get("foo"));
      }
    }.test();
  }

  @GwtIncompatible // unreasonably slow
  public void testEntriesIteration() {
    Set<Entry<String, Integer>> set =

        OneSizeTestContainerGenerator<SetMultimap<K, V>, Entry<K, V>> multimapGenerator) {
      super(multimapGenerator);
    }

    @Override
    public Set<Entry<K, V>> create(Object... elements) {
      return (Set<Entry<K, V>>) super.create(elements);
    }
  }

  static final class MultimapGetGenerator<K, V>
      extends MultimapTestSuiteBuilder.MultimapGetGenerator<K, V, SetMultimap<K, V>>

    return new TestEnumMultisetGenerator() {
      @Override
      protected Multiset<AnEnum> create(AnEnum[] elements) {
        return (elements.length == 0)
            ? EnumMultiset.create(AnEnum.class)
            : EnumMultiset.create(asList(elements));
      }
    };
  }

  private enum Color {
    BLUE,
    RED,
    YELLOW,
    GREEN,
    WHITE
  }