Table<Integer, String, Character> original = HashBasedTable.create();
    return unmodifiableTable(original);
  }

  @Override
  protected Map<String, Map<Integer, Character>> makePopulatedMap() {
    Table<Integer, String, Character> table = HashBasedTable.create();
    table.put(1, "foo", 'a');
    table.put(1, "bar", 'b');
    table.put(3, "foo", 'c');
    return unmodifiableTable(table).columnMap();

  Table<String, Character, Integer> makeTable() {
    Table<String, Character, Integer> table = HashBasedTable.create();
    return unmodifiableTable(table);
  }

  @Override
  protected Map<String, Integer> makePopulatedMap() {
    Table<String, Character, Integer> table = HashBasedTable.create();
    table.put("one", 'a', 1);
    table.put("two", 'a', 2);
    table.put("three", 'a', 3);
    table.put("four", 'b', 4);

    extends SortedMapInterfaceTest<String, Integer> {
  public ReserializedSafeTreeMapMapInterfaceTest() {
    super(false, true, true, true, true);
  }

  @Override
  protected SortedMap<String, Integer> makePopulatedMap() {
    NavigableMap<String, Integer> map = new SafeTreeMap<>();
    map.put("one", 1);
    map.put("two", 2);
    map.put("three", 3);
    return SerializableTester.reserialize(map);
  }

  @Override

@GwtCompatible
@NullUnmarked
public class SingletonImmutableMapMapInterfaceTest
    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() {

@GwtCompatible
@NullUnmarked
public class SingletonImmutableSortedMapMapInterfaceTest
    extends AbstractImmutableSortedMapMapInterfaceTest<String, Integer> {
  @Override
  protected SortedMap<String, Integer> makePopulatedMap() {
    return ImmutableSortedMap.of("one", 1);
  }

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

  @Override

@GwtCompatible
@NullUnmarked
public class ImmutableSortedMapHeadMapInclusiveMapInterfaceTest
    extends AbstractImmutableSortedMapMapInterfaceTest<String, Integer> {
  @Override
  protected SortedMap<String, Integer> makePopulatedMap() {
    return ImmutableSortedMap.of("a", 1, "b", 2, "c", 3, "d", 4, "e", 5).headMap("c", true);
  }

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

  @Override

@GwtIncompatible // SerializableTester
@NullUnmarked
public class ReserializedImmutableMapMapInterfaceTest
    extends AbstractImmutableMapMapInterfaceTest<String, Integer> {
  @Override
  protected Map<String, Integer> makePopulatedMap() {
    return SerializableTester.reserialize(ImmutableMap.of("one", 1, "two", 2, "three", 3));
  }

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

  @Override

@NullUnmarked
public class SingletonImmutableMapWithUnhashableValueMapInterfaceTest
    extends RegularImmutableMapWithUnhashableValuesMapInterfaceTest {
  @Override
  protected Map<Integer, UnhashableObject> makePopulatedMap() {
    Unhashables unhashables = new Unhashables();
    return ImmutableMap.of(0, unhashables.e0());
  }

    return Multimaps.transformValues(
            ArrayListMultimap.<String, Integer>create(), Functions.<Integer>identity())
        .asMap();
  }

  @Override
  protected Map<String, Collection<Integer>> makePopulatedMap() {
    ListMultimap<String, Integer> delegate = ArrayListMultimap.create();
    populate(delegate);
    return Multimaps.transformValues(delegate, Functions.<Integer>identity()).asMap();
  }

  @Override
  protected Map<Integer, UnhashableObject> makeEmptyMap() {
    return ImmutableMap.of();
  }

  @Override
  protected Map<Integer, UnhashableObject> makePopulatedMap() {
    Unhashables unhashables = new Unhashables();
    return ImmutableMap.of(0, unhashables.e0(), 1, unhashables.e1(), 2, unhashables.e2());
  }

  @Override
  protected Integer getKeyNotInPopulatedMap() {