@Override
  public void testContainsColumn() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    assertTrue(table.containsColumn(1));
    assertTrue(table.containsColumn(3));
    assertTrue(table.containsColumn(2));
    assertFalse(table.containsColumn(-1));
    assertFalse(table.containsColumn(null));
  }

  @Override
  public void testContainsValue() {

    assertEquals(ImmutableMap.of(), INSTANCE.columnMap());
  }

  public void testContains() {
    assertFalse(INSTANCE.contains('a', 1));
  }

  public void testContainsColumn() {
    assertFalse(INSTANCE.containsColumn(1));
  }

  public void testContainsRow() {
    assertFalse(INSTANCE.containsRow('a'));
  }

  public void testContainsValue() {
    assertFalse(INSTANCE.containsValue("blah"));
  }

    assertEquals(ImmutableMap.of(), INSTANCE.columnMap());
  }

  public void testContains() {
    assertFalse(INSTANCE.contains('a', 1));
  }

  public void testContainsColumn() {
    assertFalse(INSTANCE.containsColumn(1));
  }

  public void testContainsRow() {
    assertFalse(INSTANCE.containsRow('a'));
  }

  public void testContainsValue() {
    assertFalse(INSTANCE.containsValue("blah"));
  }

    this(cell.getRowKey(), cell.getColumnKey(), cell.getValue());
  }

  @Override
  public ImmutableMap<R, V> column(C columnKey) {
    checkNotNull(columnKey);
    return containsColumn(columnKey)
        ? ImmutableMap.of(singleRowKey, singleValue)
        : ImmutableMap.<R, V>of();
  }

  @Override
  public ImmutableMap<C, Map<R, V>> columnMap() {

      return original.contains(columnKey, rowKey);
    }

    @Override
    public boolean containsColumn(@CheckForNull Object columnKey) {
      return original.containsRow(columnKey);
    }

    @Override
    public boolean containsRow(@CheckForNull Object rowKey) {
      return original.containsColumn(rowKey);
    }

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

    return containsRow(rowKey) && containsColumn(columnKey);
  }

  /**
   * Returns {@code true} if the provided column key is among the column keys provided when the
   * table was constructed.
   */
  @Override
  public boolean containsColumn(@CheckForNull Object columnKey) {
    return columnKeyToIndex.containsKey(columnKey);
  }

  /**

    return containsRow(rowKey) && containsColumn(columnKey);
  }

  /**
   * Returns {@code true} if the provided column key is among the column keys provided when the
   * table was constructed.
   */
  @Override
  public boolean containsColumn(@CheckForNull Object columnKey) {
    return columnKeyToIndex.containsKey(columnKey);
  }

  /**

  /**
   * Returns {@code true} if the table contains a mapping with the specified column.
   *
   * @param columnKey key of column to search for
   */
  boolean containsColumn(@CompatibleWith("C") @CheckForNull Object columnKey);

  /**
   * Returns {@code true} if the table contains a mapping with the specified value.
   *
   * @param value value to search for
   */

      synchronized (mutex) {
        return delegate().containsRow(rowKey);
      }
    }

    @Override
    public boolean containsColumn(@CheckForNull Object columnKey) {
      synchronized (mutex) {
        return delegate().containsColumn(columnKey);
      }
    }

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