Collection<E> siblingCollection = new ArrayList<>();
    siblingCollection.add(sampleElement);

    Collection<E> copy = new ArrayList<>();
    // Avoid copy.addAll(collection), which runs afoul of an Android bug in older versions:
    // http://b.android.com/72073 http://r.android.com/98929
    Iterators.addAll(copy, collection.iterator());

    try {
      collection.add(sampleElement);

  public void testInverseSerialization() {
    BiMapPair<K, V> pair = new BiMapPair<>(getMap());
    BiMapPair<K, V> copy = SerializableTester.reserialize(pair);
    assertEquals(pair.forward, copy.forward);
    assertEquals(pair.backward, copy.backward);
    assertSame(copy.backward, copy.forward.inverse());
    assertSame(copy.forward, copy.backward.inverse());
  }

  private static class BiMapPair<K, V> implements Serializable {

  public void testInverseSerialization() {
    BiMapPair<K, V> pair = new BiMapPair<>(getMap());
    BiMapPair<K, V> copy = SerializableTester.reserialize(pair);
    assertEquals(pair.forward, copy.forward);
    assertEquals(pair.backward, copy.backward);
    assertSame(copy.backward, copy.forward.inverse());
    assertSame(copy.forward, copy.backward.inverse());
  }

  private static class BiMapPair<K, V> implements Serializable {

    }

    private static <T> List<T> copyList(List<T> original) {
        List<T> copy = null;

        if (original != null) {
            copy = new ArrayList<>();

            if (!original.isEmpty()) {
                copy.addAll(original);
            }
        }

        return copy;
    }

    Graph<Integer> directedGraph = buildDirectedGraph();

    Graph<Integer> copy = copyOf(directedGraph);
    assertThat(copy).isEqualTo(directedGraph);
  }

  @Test
  public void copyOf_undirectedGraph() {
    Graph<Integer> undirectedGraph = buildUndirectedGraph();

    Graph<Integer> copy = copyOf(undirectedGraph);
    assertThat(copy).isEqualTo(undirectedGraph);
  }

  @Test

    // Calls to the original memoized supplier shouldn't affect its copy.
    Object unused = memoizedSupplier.get();

    Supplier<Integer> copy = reserialize(memoizedSupplier);
    Object unused2 = memoizedSupplier.get();

    CountingSupplier countingCopy =
        (CountingSupplier) ((Suppliers.ExpiringMemoizingSupplier<Integer>) copy).delegate;
    checkExpiration(countingCopy, copy);
  }

  @J2ktIncompatible

    // Calls to the original memoized supplier shouldn't affect its copy.
    Object unused = memoizedSupplier.get();

    Supplier<Integer> copy = reserialize(memoizedSupplier);
    Object unused2 = memoizedSupplier.get();

    CountingSupplier countingCopy =
        (CountingSupplier) ((Suppliers.ExpiringMemoizingSupplier<Integer>) copy).delegate;
    checkExpiration(countingCopy, copy);
  }

  @J2ktIncompatible

    assertTrue(Files.equal(asciiFile, asciiFile));

    File temp = createTempFile();
    Files.copy(asciiFile, temp);
    assertTrue(Files.equal(asciiFile, temp));

    Files.copy(i18nFile, temp);
    assertTrue(Files.equal(i18nFile, temp));

    Files.copy(asciiFile, temp);
    RandomAccessFile rf = new RandomAccessFile(temp, "rw");
    rf.writeByte(0);
    rf.close();

@J2ktIncompatible // Super-sourced
@ElementTypesAreNonnullByDefault
abstract class GwtFluentFutureCatchingSpecialization<V extends @Nullable Object>
    extends AbstractFuture<V> {
  /*
   * This server copy of the class is empty. The corresponding GWT copy contains alternative
   * versions of catching() and catchingAsync() with slightly different signatures from the ones
   * found in FluentFuture.java.
   */

    ImmutableList.Builder<List<E>> axesBuilder = new ImmutableList.Builder<>(lists.size());
    for (List<? extends E> list : lists) {
      List<E> copy = ImmutableList.copyOf(list);
      if (copy.isEmpty()) {
        return ImmutableList.of();
      }
      axesBuilder.add(copy);
    }
    return new CartesianList<>(axesBuilder.build());
  }

  CartesianList(ImmutableList<List<E>> axes) {
    this.axes = axes;