*
   * <p>returns a set containing six lists:
   *
   * <ul>
   *   <li>{@code ImmutableList.of(1, "A")}
   *   <li>{@code ImmutableList.of(1, "B")}
   *   <li>{@code ImmutableList.of(1, "C")}
   *   <li>{@code ImmutableList.of(2, "A")}
   *   <li>{@code ImmutableList.of(2, "B")}
   *   <li>{@code ImmutableList.of(2, "C")}
   * </ul>
   *

   */
  public static <T extends @Nullable Object> ImmutableList<ListenableFuture<T>> inCompletionOrder(
      Iterable<? extends ListenableFuture<? extends T>> futures) {
    ListenableFuture<? extends T>[] copy = gwtCompatibleToArray(futures);
    InCompletionOrderState<T> state = new InCompletionOrderState<>(copy);
    ImmutableList.Builder<AbstractFuture<T>> delegatesBuilder =
        ImmutableList.builderWithExpectedSize(copy.length);

    assertTrue(partitions.hasNext());
    assertEquals(ImmutableList.of(1), partitions.next());
    assertFalse(partitions.hasNext());
  }

  @GwtIncompatible // fairly slow (~50s)
  public void testPartition_general() {
    new IteratorTester<List<Integer>>(
        5,
        IteratorFeature.UNMODIFIABLE,
        ImmutableList.of(asList(1, 2, 3), asList(4, 5, 6), asList(7)),

    assertSubtypeTokenBeforeSupertypeToken(ImmutableList.<TypeToken<?>>of());
  }

  public void testAssertSubtypeTokenBeforeSupertypeToken_oneType() {
    assertSubtypeTokenBeforeSupertypeToken(ImmutableList.of(TypeToken.of(String.class)));
  }

  public void testAssertSubtypeTokenBeforeSupertypeToken_subtypeFirst() {
    assertSubtypeTokenBeforeSupertypeToken(

    assertSubtypeTokenBeforeSupertypeToken(ImmutableList.<TypeToken<?>>of());
  }

  public void testAssertSubtypeTokenBeforeSupertypeToken_oneType() {
    assertSubtypeTokenBeforeSupertypeToken(ImmutableList.of(TypeToken.of(String.class)));
  }

  public void testAssertSubtypeTokenBeforeSupertypeToken_subtypeFirst() {
    assertSubtypeTokenBeforeSupertypeToken(

import static org.junit.Assert.assertThrows;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.timeout;
import static org.mockito.Mockito.verify;

import com.google.common.collect.ImmutableList;
import com.google.common.reflect.Reflection;
import com.google.common.truth.FailureStrategy;
import com.google.common.truth.StandardSubjectBuilder;
import com.google.common.util.concurrent.ClosingFuture.AsyncClosingCallable;

    assertTrue(partitions.hasNext());
    assertEquals(ImmutableList.of(1), partitions.next());
    assertFalse(partitions.hasNext());
  }

  @GwtIncompatible // fairly slow (~50s)
  public void testPartition_general() {
    new IteratorTester<List<Integer>>(
        5,
        IteratorFeature.UNMODIFIABLE,
        ImmutableList.of(asList(1, 2, 3), asList(4, 5, 6), asList(7)),

import com.google.common.cache.TestingCacheLoaders.IdentityLoader;
import com.google.common.cache.TestingRemovalListeners.CountingRemovalListener;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.testing.FakeTicker;
import com.google.common.testing.TestLogHandler;

   * example using {@link Arrays#asList(Object[])}, making this method unnecessary.
   *
   * <p>The {@code Iterable} equivalent of this method is either {@link Arrays#asList(Object[])},
   * {@link ImmutableList#copyOf(Object[])}}, or {@link ImmutableList#of}.
   */
  @SafeVarargs
  public static <T extends @Nullable Object> UnmodifiableIterator<T> forArray(T... array) {
    return forArrayWithPosition(array, 0);
  }

  /**