implements Table<R, C, V> {

  @Override
  public boolean containsRow(@CheckForNull Object rowKey) {
    return Maps.safeContainsKey(rowMap(), rowKey);
  }

  @Override
  public boolean containsColumn(@CheckForNull Object columnKey) {
    return Maps.safeContainsKey(columnMap(), columnKey);
  }

  @Override
  public Set<R> rowKeySet() {
    return rowMap().keySet();
  }

  @Override

    implements Table<R, C, V> {

  @Override
  public boolean containsRow(@CheckForNull Object rowKey) {
    return Maps.safeContainsKey(rowMap(), rowKey);
  }

  @Override
  public boolean containsColumn(@CheckForNull Object columnKey) {
    return Maps.safeContainsKey(columnMap(), columnKey);
  }

  @Override
  public Set<R> rowKeySet() {
    return rowMap().keySet();
  }

  @Override

  boolean isPartialView() {
    return false;
  }

  public final boolean isEmpty() {
    return delegate.isEmpty();
  }

  public final boolean containsKey(@Nullable Object key) {
    return Maps.safeContainsKey(delegate, key);
  }

  public final boolean containsValue(@Nullable Object value) {
    return delegate.containsValue(value);
  }

  public @Nullable V get(@Nullable Object key) {

      return false;
    }
    for (Map<C, V> map : backingMap.values()) {
      if (safeContainsKey(map, columnKey)) {
        return true;
      }
    }
    return false;
  }

  @Override
  public boolean containsRow(@CheckForNull Object rowKey) {
    return rowKey != null && safeContainsKey(backingMap, rowKey);
  }

  @Override
  public boolean containsValue(@CheckForNull Object value) {

      return false;
    }
    for (Map<C, V> map : backingMap.values()) {
      if (safeContainsKey(map, columnKey)) {
        return true;
      }
    }
    return false;
  }

  @Override
  public boolean containsRow(@CheckForNull Object rowKey) {
    return rowKey != null && safeContainsKey(backingMap, rowKey);
  }

  @Override
  public boolean containsValue(@CheckForNull Object value) {

      return new AsMapEntries();
    }

    // The following methods are included for performance.

    @Override
    public boolean containsKey(@CheckForNull Object key) {
      return Maps.safeContainsKey(submap, key);
    }

    @Override
    @CheckForNull
    public Collection<V> get(@CheckForNull Object key) {
      Collection<V> collection = Maps.safeGet(submap, key);

      return new AsMapEntries();
    }

    // The following methods are included for performance.

    @Override
    public boolean containsKey(@CheckForNull Object key) {
      return Maps.safeContainsKey(submap, key);
    }

    @Override
    @CheckForNull
    public Collection<V> get(@CheckForNull Object key) {
      Collection<V> collection = Maps.safeGet(submap, key);

      return null;
    }
  }

  /**
   * Delegates to {@link Map#containsKey}. Returns {@code false} on {@code ClassCastException} and
   * {@code NullPointerException}.
   */
  static boolean safeContainsKey(Map<?, ?> map, @CheckForNull Object key) {
    checkNotNull(map);
    try {
      return map.containsKey(key);
    } catch (ClassCastException | NullPointerException e) {
      return false;
    }

      return null;
    }
  }

  /**
   * Delegates to {@link Map#containsKey}. Returns {@code false} on {@code ClassCastException} and
   * {@code NullPointerException}.
   */
  static boolean safeContainsKey(Map<?, ?> map, @CheckForNull Object key) {
    checkNotNull(map);
    try {
      return map.containsKey(key);
    } catch (ClassCastException | NullPointerException e) {
      return false;
    }