assertThat(table.row('c').keySet()).containsExactly(1, 2, 3).inOrder();
  }

  public void testSerialization_empty() {
    validateReserialization(ImmutableTable.of());
  }

  public void testSerialization_singleElement() {
    validateReserialization(ImmutableTable.of('a', 2, "foo"));
  }

  public void testDenseSerialization_manualOrder() {