}

  // TODO(b/172823566): Use mainline testToImmutableSetMultimap once CollectorTester is usable.
  public void testToImmutableSetMultimap_java7_combine() {
    ImmutableSetMultimap.Builder<String, Integer> zis =
        ImmutableSetMultimap.<String, Integer>builder().put("a", 1).put("b", 2);
    ImmutableSetMultimap.Builder<String, Integer> zat =

      extends TestFilteredMultimapGenerator<SetMultimap<String, Integer>>
      implements TestSetMultimapGenerator<String, Integer> {

    abstract SetMultimap<String, Integer> filter(SetMultimap<String, Integer> multimap);

    @Override
    public SetMultimap<String, Integer> create(Object... elements) {
      SetMultimap<String, Integer> multimap = LinkedHashMultimap.create();
      for (Object o : elements) {

        if (pos < value.length && value[pos] == '\"') {
          // Quoted string.
          pos++ // Consume '"' open quote.
          val parameterStart = pos
          pos = value.indexOf('"', pos)
          parameter = value.substring(parameterStart, pos)
          pos++ // Consume '"' close quote (if necessary).
        } else {
          // Unquoted string.
          val parameterStart = pos

constraints.DecimalMin.message  = {item} must be greater than ${inclusive == true ? 'or equal to ' : ''}{value}.
constraints.Digits.message      = {item} is numeric value out of bounds (<{integer} digits>.<{fraction} digits> expected).
constraints.Future.message      = {item} must be in the future.
constraints.Max.message         = {item} must be less than or equal to {value}.

      } else {
        return first.compareTo(second);
      }
    }
  }

  /** Decreasing integer values. A {@code null} comes before any non-null value. */
  private static final Comparator<@Nullable Integer> DECREASING_INT_COMPARATOR =
      Ordering.<Integer>natural().reverse().<Integer>nullsFirst();

  private SetMultimap<String, Integer> create() {
    return TreeMultimap.create(StringLength.COMPARATOR, DECREASING_INT_COMPARATOR);
  }

  private static final Predicate<Entry<String, Integer>> ENTRY_PREDICATE =
      new Predicate<Entry<String, Integer>>() {
        @Override
        public boolean apply(Entry<String, Integer> entry) {
          return !"badkey".equals(entry.getKey()) && !((Integer) 55556).equals(entry.getValue());
        }
      };

  protected Multimap<String, Integer> create() {
    Multimap<String, Integer> unfiltered = HashMultimap.create();

  private static final Predicate<@Nullable Integer> EVEN = input -> input == null || input % 2 == 0;
  static final Predicate<Entry<String, Integer>> CORRECT_LENGTH =
      input -> input.getKey().length() == input.getValue();

  abstract Map<String, Integer> createUnfiltered();

  public void testFilteredKeysIllegalPut() {
    Map<String, Integer> unfiltered = createUnfiltered();

    Iterator<Integer> iter =
        new AbstractIterator<Integer>() {
          @Override
          public Integer computeNext() {
            endOfData();
            throw new SomeUncheckedException();
          }
        };
    assertThrows(SomeUncheckedException.class, iter::hasNext);
  }

  public void testCantRemove() {
    Iterator<Integer> iter =

    }
    Set<Entry<Integer, Integer>> entries = bimap.entrySet();
    for (Entry<Integer, Integer> entry : entries) {
      entry.setValue(entry.getValue() + 2 * N);
    }
    for (int i = 0; i < N; i++) {
      assertEquals(2 * N + 2 * i - 1, (int) bimap.get(2 * i));
    }
  }

  public void testBiMapEntrySetIteratorRemove() {
    BiMap<Integer, String> map = HashBiMap.create();

    ImmutableBiMap.Builder<Integer, Integer> builder = ImmutableBiMap.builderWithExpectedSize(10);
    Entry<Integer, Integer>[] builderArray = builder.entries;
    for (int i = 0; i < 10; i++) {
      builder.put(i, i);
    }
    Entry<Integer, Integer>[] builderArrayAfterPuts = builder.entries;
    RegularImmutableBiMap<Integer, Integer> map =
        (RegularImmutableBiMap<Integer, Integer>) builder.build();