public void containsCell(
      @Nullable Object rowKey, @Nullable Object colKey, @Nullable Object value) {
    containsCell(
        Tables.<@Nullable Object, @Nullable Object, @Nullable Object>immutableCell(
            rowKey, colKey, value));
  }
@Test
  public void containsCell() {
    ImmutableTable<String, String, String> table = ImmutableTable.of("row", "col", "val");
    assertThat(table).containsCell("row", "col", "val");
    assertThat(table).containsCell(cell("row", "col", "val"));
  }