Unhashables unhashables = new Unhashables();
    return ImmutableMap.of(0, unhashables.e0(), 1, unhashables.e1(), 2, unhashables.e2());
  }

  @Override
  protected Integer getKeyNotInPopulatedMap() {
    return 3;
  }

  @Override
  protected UnhashableObject getValueNotInPopulatedMap() {
    return new Unhashables().e3();
  }

@NullUnmarked
public class ArrayTableColumnTest extends ColumnTests {
  public ArrayTableColumnTest() {
    super(true, true, false, false, false);
  }

  @Override
  protected String getKeyNotInPopulatedMap() {
    throw new UnsupportedOperationException();
  }

  @Override
  protected Map<String, Integer> makeEmptyMap() {
    throw new UnsupportedOperationException();
  }

  @Override

    return ImmutableMap.of(
        colliders.e0(), 0,
        colliders.e1(), 1,
        colliders.e2(), 2,
        colliders.e3(), 3);
  }

  @Override
  protected Object getKeyNotInPopulatedMap() {
    return new Colliders().e4();
  }

  @Override
  protected Integer getValueNotInPopulatedMap() {
    return 4;
  }

@GwtIncompatible // TODO(hhchan): ArrayTable
@NullUnmarked
public class ArrayTableRowTest extends RowTests {
  public ArrayTableRowTest() {
    super(true, true, false, false, false);
  }

  @Override
  protected String getKeyNotInPopulatedMap() {
    throw new UnsupportedOperationException();
  }

  @Override
  protected Map<String, Integer> makeEmptyMap() {
    throw new UnsupportedOperationException();
  }

  @Override

    NavigableMap<String, Integer> map = new SafeTreeMap<>();
    return SerializableTester.reserialize(map);
  }

  @Override
  protected String getKeyNotInPopulatedMap() {
    return "minus one";
  }

  @Override
  protected Integer getValueNotInPopulatedMap() {
    return -1;
  }

    multimap.put("f", 1);
    multimap.put("f", 2);
    multimap.put("g", 3);
    multimap.put("h", 4);
    return multimap.asMap().subMap("e", "p");
  }

  @Override
  protected String getKeyNotInPopulatedMap() {
    return "a";
  }

  @Override
  protected Collection<Integer> getValueNotInPopulatedMap() {
    return singleton(-2);
  }

  @Override
  public void testEntrySetRemoveAllNullFromEmpty() {

    extends AbstractImmutableMapMapInterfaceTest<String, Integer> {
  @Override
  protected Map<String, Integer> makePopulatedMap() {
    return ImmutableMap.of("one", 1);
  }

  @Override
  protected String getKeyNotInPopulatedMap() {
    return "minus one";
  }

  @Override
  protected Integer getValueNotInPopulatedMap() {
    return -1;
  }

    table.put("b", "b", "x");
    table.put("b", "c", "y");
    table.put("b", "x", "n");
    table.put("a", "a", "d");
    return table.row("b");
  }

  @Override
  protected String getKeyNotInPopulatedMap() {
    return "q";
  }

  @Override
  protected String getValueNotInPopulatedMap() {
    return "p";
  }

  public void testClearSubMapOfRowMap() {

  @Override
  protected SortedMap<String, Integer> makePopulatedMap() {
    return ImmutableSortedMap.of("a", 1, "b", 2, "c", 3, "d", 4, "e", 5).headMap("d");
  }

  @Override
  protected String getKeyNotInPopulatedMap() {
    return "d";
  }

  @Override
  protected Integer getValueNotInPopulatedMap() {
    return 4;
  }

    return ImmutableMap.of();
  }

  @Override
  protected Map<String, Integer> makePopulatedMap() {
    return ImmutableMap.of("one", 1, "two", 2, "three", 3);
  }

  @Override
  protected String getKeyNotInPopulatedMap() {
    return "minus one";
  }

  @Override
  protected Integer getValueNotInPopulatedMap() {
    return -1;
  }