Enumeration<Integer> enumer = Iterators.asEnumeration(iter);

    assertTrue(enumer.hasMoreElements());
    assertEquals(1, (int) enumer.nextElement());
    assertTrue(enumer.hasMoreElements());
    assertEquals(2, (int) enumer.nextElement());
    assertTrue(enumer.hasMoreElements());
    assertEquals(3, (int) enumer.nextElement());
    assertFalse(enumer.hasMoreElements());
  }

 * strings. This only supports the {@code "%s"} specifier, not the full range of {@link
 * java.util.Formatter} specifiers. However, note that if the number of arguments does not match the
 * number of occurrences of {@code "%s"} in the format string, {@code Preconditions} will still
 * behave as expected, and will still include all argument values in the error message; the message

   * comparator has a more general type than the map's keys, such as creating a {@code
   * SortedMap<Integer, String>} with a {@code Comparator<Number>}, use the {@link Builder}
   * constructor instead.
   *
   * @throws NullPointerException if {@code comparator} is null
   */
  public static <K, V> Builder<K, V> orderedBy(Comparator<K> comparator) {

    Map<Object, Number> map2 = ImmutableMap.<Object, Number>of(1, 2);
    Map<Object, Integer> map3 = ImmutableMap.<Object, Integer>of(1, 2);
    Map<Number, Object> map4 = ImmutableMap.<Number, Object>of(1, 2);
    Map<Number, Number> map5 = ImmutableMap.<Number, Number>of(1, 2);
    Map<Number, Integer> map6 = ImmutableMap.<Number, Integer>of(1, 2);

    Map<Object, Number> map2 = ImmutableMap.<Object, Number>of(1, 2);
    Map<Object, Integer> map3 = ImmutableMap.<Object, Integer>of(1, 2);
    Map<Number, Object> map4 = ImmutableMap.<Number, Object>of(1, 2);
    Map<Number, Number> map5 = ImmutableMap.<Number, Number>of(1, 2);
    Map<Number, Integer> map6 = ImmutableMap.<Number, Integer>of(1, 2);

   * comparator has a more general type than the map's keys, such as creating a {@code
   * SortedMap<Integer, String>} with a {@code Comparator<Number>}, use the {@link Builder}
   * constructor instead.
   *
   * @throws NullPointerException if {@code comparator} is null
   */
  public static <K, V> Builder<K, V> orderedBy(Comparator<K> comparator) {

  public <N1 extends Number, N2 extends Number, N11 extends N1>
      void testisSupertypeOf_equalWildcardTypes() {
    assertAssignable(
        new TypeToken<List<? extends N1>>() {}, new TypeToken<List<? extends N1>>() {});
    assertAssignable(new TypeToken<List<? super N1>>() {}, new TypeToken<List<? super N1>>() {});
    assertAssignable(
        new TypeToken<List<? extends Number>>() {}, new TypeToken<List<? extends Number>>() {});

  static final int MAXIMUM_CAPACITY = Ints.MAX_POWER_OF_TWO;

  /** The maximum number of segments to allow; used to bound constructor arguments. */
  static final int MAX_SEGMENTS = 1 << 16; // slightly conservative

  /** Number of (unsynchronized) retries in the containsValue method. */
  static final int CONTAINS_VALUE_RETRIES = 3;

  /**
   * Number of cache access operations that can be buffered per segment before the cache's recency

   * is what most users want and expect it to do.
   *
   * <p>This behavior can't be broadly guaranteed, but has been tested with OpenJDK 1.7 and 1.8.
   *
   * @param expectedSize the number of elements you expect to add to the returned set
   * @return a new, empty hash set with enough capacity to hold {@code expectedSize} elements
   *     without resizing

   * This is the actual implementation of {@link #precomputed}, but we bounce calls through a method
   * on {@link Platform} so that we can have different behavior in GWT.
   *
   * <p>This implementation tries to be smart in a number of ways. It recognizes cases where the
   * negation is cheaper to precompute than the matcher itself; it tries to build small hash tables
   * for matchers that only match a few characters, and so on. In the worst-case scenario, it