}

    @Override
    protected Multiset<T> delegate() {
      return backingCollection;
    }

    @Override
    public boolean addAll(Collection<? extends T> collection) {
      return standardAddAll(collection);
    }

    @Override
    public boolean add(T element) {
      return standardAdd(element);
    }

    @Override
    public void clear() {
      standardClear();

  }

  @Override
  public boolean isEmpty() {
    return delegate.isEmpty();
  }

  @Override
  public Iterator<E> iterator() {
    return delegate.iterator();
  }

  @Override
  public E last() {
    return delegate.last();
  }

  @Override
  public @Nullable E lower(E e) {
    return delegate.lower(checkValid(e));
  }

  @Override

    public final Object mutex = new Integer(1); // something Serializable

    @Override
    public boolean offer(E o) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.offer(o);
    }

    @Override
    public @Nullable E poll() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.poll();
    }

    @Override
    public E remove() {
      assertTrue(Thread.holdsLock(mutex));

    @Override
    @CheckForNull
    public K pollLast() {
      return Iterators.pollNext(descendingIterator());
    }

    @Override
    public NavigableSet<K> descendingSet() {
      return new NavigableKeySet(sortedMap().descendingMap());
    }

    @Override
    public Iterator<K> descendingIterator() {
      return descendingSet().iterator();
    }

    @Override

    @Override
    @CheckForNull
    public Map<R, V> remove(@CheckForNull Object key) {
      return containsColumn(key) ? removeColumn(key) : null;
    }

    @Override
    public Set<Entry<C, Map<R, V>>> createEntrySet() {
      return new ColumnMapEntrySet();
    }

    @Override
    public Set<C> keySet() {
      return columnKeySet();
    }

    @Override

    @Override
    public void tearDown() throws IOException {}
  }

  private static class ByteArraySourceFactory implements ByteSourceFactory {

    @Override
    public ByteSource createSource(byte[] bytes) throws IOException {
      return ByteSource.wrap(bytes);
    }

    @Override
    public byte[] getExpected(byte[] bytes) {
      return bytes;
    }

    @Override

  class Values extends AbstractCollection<V> {
    @Override
    public Iterator<V> iterator() {
      return valuesIterator();
    }

    @Override
    public boolean contains(@CheckForNull Object o) {
      return containsValue(o);
    }

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

    @Override
    public int size() {

  /** Constructor for use by subclasses. */
  protected ForwardingMultimap() {}

  @Override
  protected abstract Multimap<K, V> delegate();

  @Override
  public Map<K, Collection<V>> asMap() {
    return delegate().asMap();
  }

  @Override
  public void clear() {
    delegate().clear();
  }

  @Override
  public boolean containsEntry(@CheckForNull Object key, @CheckForNull Object value) {

  /** Constructor for use by subclasses. */
  protected ForwardingDeque() {}

  @Override
  protected abstract Deque<E> delegate();

  @Override
  public void addFirst(@ParametricNullness E e) {
    delegate().addFirst(e);
  }

  @Override
  public void addLast(@ParametricNullness E e) {
    delegate().addLast(e);
  }

  @Override
  public Iterator<E> descendingIterator() {
    return delegate().descendingIterator();

      this.backingSortedSet = backingSortedSet;
    }

    @Override
    protected SortedSet<T> delegate() {
      return backingSortedSet;
    }

    @Override
    public boolean equals(@Nullable Object object) {
      return standardEquals(object);
    }

    @Override
    public int hashCode() {
      return standardHashCode();
    }

    @Override
    public boolean addAll(Collection<? extends T> collection) {