/** Most of the tests in this class run against every one of these caches. */
  private Iterable<LoadingCache<Object, Object>> caches() {
    // lots of different ways to configure a LoadingCache
    CacheBuilderFactory factory = cacheFactory();
    return Iterables.transform(
        factory.buildAllPermutations(),
        new Function<CacheBuilder<Object, Object>, LoadingCache<Object, Object>>() {

    return fromArrayWithExpectedSize(array, expectedSize);
  }

  /**
   * Returns an immutable set containing each of {@code elements}, minus duplicates, in the order
   * each appears first in the source iterable. This method iterates over {@code elements} only
   * once.
   *
   * <p><b>Performance note:</b> This method will sometimes recognize that the actual copy operation

    }
    @Nullable Object[] result = new Object[length];
    arraycopy(elements, offset, result, 0, length);
    return result;
  }

  @CanIgnoreReturnValue
  private static @Nullable Object[] fillArray(Iterable<?> elements, @Nullable Object[] array) {
    int i = 0;
    for (Object element : elements) {
      array[i++] = element;
    }
    return array;
  }

   * entries in the same order as the original iterable.
   *
   * @throws NullPointerException if any key, value, or entry is null
   * @throws IllegalArgumentException if two entries have the same key
   * @since 19.0
   */
  public static <K, V> ImmutableMap<K, V> copyOf(
      Iterable<? extends Entry<? extends K, ? extends V>> entries) {

   *
   * @param values a series of values, which will be converted to {@code double} values (this may
   *     cause loss of precision)
   */
  public static Stats of(Iterable<? extends Number> values) {
    StatsAccumulator accumulator = new StatsAccumulator();
    accumulator.addAll(values);
    return accumulator.snapshot();
  }

  /**

  private static final Iterable<Integer> SOME_ITERABLE = new SomeIterable();

  private static final class RemoveFirstFunction implements Function<String, String>, Serializable {
    @Override
    public String apply(String from) {
      return (from.length() == 0) ? from : from.substring(1);
    }
  }

  private static class SomeIterable implements Iterable<Integer>, Serializable {
    @Override

   * entries in the same order as the original iterable.
   *
   * @throws NullPointerException if any key, value, or entry is null
   * @throws IllegalArgumentException if two entries have the same key
   * @since 19.0
   */
  public static <K, V> ImmutableMap<K, V> copyOf(
      Iterable<? extends Entry<? extends K, ? extends V>> entries) {
    int initialCapacity =

  // This function specifically returns a BiPredicate, because Guava7’s Equivalence class does not
  // actually implement BiPredicate, and CollectorTests expects a BiPredicate.
  static <C, E extends @Nullable Object, R extends Iterable<E>>
      BiPredicate<C, C> pairwiseOnResultOf(Function<C, R> arg) {
    Equivalence<C> equivalence = Equivalence.equals().<E>pairwise().onResultOf(arg);
    return equivalence::equivalent;
  }

    }
    @Nullable Object[] result = new Object[length];
    arraycopy(elements, offset, result, 0, length);
    return result;
  }

  @CanIgnoreReturnValue
  private static @Nullable Object[] fillArray(Iterable<?> elements, @Nullable Object[] array) {
    int i = 0;
    for (Object element : elements) {
      array[i++] = element;
    }
    return array;
  }

    @SuppressWarnings("unchecked")
    @Override
    public Entry<Country, Currency>[] createArray(int length) {
      return (Entry<Country, Currency>[]) new Entry<?, ?>[length];
    }

    @Override
    public Iterable<Entry<Country, Currency>> order(List<Entry<Country, Currency>> insertionOrder) {
      return orderEntriesByKey(insertionOrder);
    }

    @Override
    public Country[] createKeyArray(int length) {