}
      return false;
    }

    @Override
    public void clear() {
      AbstractTable.this.clear();
    }

    @Override
    public Iterator<Table.Cell<R, C, V>> iterator() {
      return cellIterator();
    }

    @Override
    public int size() {
      return AbstractTable.this.size();
    }
  }

  @LazyInit private transient @Nullable Collection<V> values;

    @Override
    public void clear() {
      AbstractTable.this.clear();
    }

    @Override
    public Iterator<Table.Cell<R, C, V>> iterator() {
      return cellIterator();
    }

    @Override
    public Spliterator<Cell<R, C, V>> spliterator() {
      return cellSpliterator();
    }

    @Override
    public int size() {
      return AbstractTable.this.size();
    }
  }

 * @since 10.0
 */
// We explicitly list `implements Table<...>` so that its `@Nullable V` appears in Javadoc.
@SuppressWarnings("RedundancyRemover")
@GwtCompatible
public final class ArrayTable<R, C, V> extends AbstractTable<R, C, @Nullable V>
    implements Table<R, C, @Nullable V>, Serializable {

  /**
   * Creates an {@code ArrayTable} filled with {@code null}.
   *

 * concurrently and one of the threads modifies the table, it must be synchronized externally.
 *
 * @author Jared Levy
 */
@GwtCompatible
class StandardTable<R, C, V> extends AbstractTable<R, C, V> implements Serializable {
  final Map<R, Map<C, V>> backingMap;
  final Supplier<? extends Map<C, V>> factory;

  StandardTable(Map<R, Map<C, V>> backingMap, Supplier<? extends Map<C, V>> factory) {