for (ImmutableTable<Character, Integer, String> testInstance : getTestInstances()) {
      assertEquals(ImmutableMap.of(1, "foo", 2, "baz"), testInstance.row('a'));
      assertEquals(ImmutableMap.of(1, "bar"), testInstance.row('b'));
      assertEquals(ImmutableMap.of(), testInstance.row('c'));
    }
  }

  public void testRowKeySet() {
    for (ImmutableTable<Character, Integer, String> testInstance : getTestInstances()) {

      Map<Integer, C> row = table.row("foo");
      assertEquals(ImmutableMap.of(1, 'a', 3, 'c'), row);
      table.remove("foo", 3);
      assertEquals(ImmutableMap.of(1, 'a'), row);
      table.remove("foo", 1);
      assertEquals(ImmutableMap.of(), row);
      table.put("foo", 2, cellValue('b'));
      assertEquals(ImmutableMap.of(2, 'b'), row);
      row.clear();
      assertEquals(ImmutableMap.of(), row);

    private final R row;
    private final C column;
    private V value;

    MutableCell(R row, C column, V value) {
      this.row = checkNotNull(row, "row");
      this.column = checkNotNull(column, "column");
      this.value = checkNotNull(value, "value");
    }

    @Override
    public R getRowKey() {
      return row;
    }

    @Override

      Map<Integer, C> row = table.row("foo");
      assertEquals(ImmutableMap.of(1, 'a', 3, 'c'), row);
      table.remove("foo", 3);
      assertEquals(ImmutableMap.of(1, 'a'), row);
      table.remove("foo", 1);
      assertEquals(ImmutableMap.of(), row);
      table.put("foo", 2, cellValue('b'));
      assertEquals(ImmutableMap.of(2, 'b'), row);
      row.clear();
      assertEquals(ImmutableMap.of(), row);

    assertSame(original.values(), transpose.values());
    assertEquals(original.row(1), transpose.column(1));
    assertEquals(original.row(2), transpose.column(2));
    assertEquals(original.column("foo"), transpose.row("foo"));
    assertEquals(original.column("bar"), transpose.row("bar"));
  }

    table.put('a', "one", 1);
    table.put('a', "two", 2);
    table.put('a', "three", 3);
    table.put('b', "four", 4);
    return Tables.unmodifiableTable(table).row('a');
  }

    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    assertEquals(ImmutableMap.of(1, 'a', 3, 'c'), table.row("foo"));
  }

  // This test assumes that the implementation does not support null keys.
  public void testRowNull() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    try {
      table.row(null);
      fail();
    } catch (NullPointerException expected) {
    }
  }

    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    assertEquals(ImmutableMap.of(1, 'a', 3, 'c'), table.row("foo"));
  }

  // This test assumes that the implementation does not support null keys.
  public void testRowNull() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    try {
      table.row(null);
      fail();
    } catch (NullPointerException expected) {
    }
  }

      assertTrue(Thread.holdsLock(mutex));
      return delegate.remove(rowKey, columnKey);
    }

    @Override
    public Map<C, V> row(R rowKey) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.row(rowKey);
    }

    @Override
    public Set<R> rowKeySet() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.rowKeySet();
    }

    assertEquals(ImmutableMap.of(1, ImmutableMap.of('a', "blah")), testTable.columnMap());
  }

  public void testRow() {
    assertEquals(ImmutableMap.of(), testTable.row('A'));
    assertEquals(ImmutableMap.of(1, "blah"), testTable.row('a'));
  }

  public void testRowKeySet() {
    assertEquals(ImmutableSet.of('a'), testTable.rowKeySet());
  }

  public void testRowMap() {