public void testViewSerialization() {
    Map<String, Integer> map = ImmutableSortedMap.of("one", 1, "two", 2, "three", 3);
    SerializableTester.reserializeAndAssert(map.entrySet());
    SerializableTester.reserializeAndAssert(map.keySet());
    assertEquals(
        new ArrayList<>(map.values()),
        new ArrayList<>(SerializableTester.reserialize(map.values())));
  }

  @GwtIncompatible // SerializableTester

            }
            return result;
          }
        });
  }

  @Override
  ImmutableSet<K> createKeySet() {
    return ImmutableSet.unsafeDelegate(delegate.keySet());
  }

  @Override
  ImmutableCollection<V> createValues() {
    return ImmutableCollection.unsafeDelegate(delegate.values());
  }

  @Override
  public int size() {
    return delegate.size();

    assertContainsAllOf(
        keys.entrySet(), Multisets.immutableEntry((K) null, 2), Multisets.immutableEntry(k1(), 1));
  }

  public void testKeysElementSet() {
    assertEquals(multimap().keySet(), multimap().keys().elementSet());
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testKeysRemove() {
    int original = multimap().keys().remove(k0(), 1);

      ImmutableSortedMap.Builder<String, Integer> builder = ImmutableSortedMap.naturalOrder();
      for (int i = 0; i < elements.length; i++) {
        builder.put(elements[i], i);
      }
      return builder.build().keySet().asList();
    }

    @Override
    public List<String> order(List<String> insertionOrder) {
      return Ordering.<String>natural().sortedCopy(insertionOrder);
    }
  }

    return MoreObjects.firstNonNull(
        (ImmutableMap<R, V>) columnMap().get(columnKey), ImmutableMap.<R, V>of());
  }

  @Override
  public ImmutableSet<C> columnKeySet() {
    return columnMap().keySet();
  }

  /**
   * {@inheritDoc}
   *
   * <p>The value {@code Map<R, V>} instances in the returned map are {@link ImmutableMap} instances
   * as well.
   */
  @Override

  @CollectionSize.Require(SEVERAL)
  public void testRemovePresentConcurrentWithKeySetIteration() {
    assertThrows(
        ConcurrentModificationException.class,
        () -> {
          Iterator<K> iterator = getMap().keySet().iterator();
          getMap().remove(k0());
          iterator.next();
        });
  }

  @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_REMOVE})
  @CollectionSize.Require(SEVERAL)

        for (Range<K> range : toRemove) {
          TreeRangeMap.this.remove(range);
        }
        return !toRemove.isEmpty();
      }

      @Override
      public Set<Range<K>> keySet() {
        return new Maps.KeySet<Range<K>, V>(SubRangeMapAsMap.this) {
          @Override
          public boolean remove(@Nullable Object o) {
            return SubRangeMapAsMap.this.remove(o) != null;
          }

      ImmutableSortedMap.Builder<String, Integer> builder = ImmutableSortedMap.naturalOrder();
      for (int i = 0; i < elements.length; i++) {
        builder.put(elements[i], i);
      }
      return builder.build().keySet().asList();
    }

    @Override
    public List<String> order(List<String> insertionOrder) {
      return Ordering.<String>natural().sortedCopy(insertionOrder);
    }
  }

    TestContainerGenerator<Map<K, V>, Entry<K, V>> generator = mapGenerator.getInnerGenerator();
    if (generator instanceof TestSortedMapGenerator
        && ((TestSortedMapGenerator<K, V>) generator).create().keySet() instanceof SortedSet) {
      return new MapSortedKeySetGenerator<>(mapGenerator);
    } else {
      return new MapKeySetGenerator<>(mapGenerator);
    }
  }

            if (StringUtil.isBlank(value)) {
                list = Collections.emptyList();
            } else {
                final Set<String> keySet = new HashSet<>();
                list = split(value, "\n").get(stream -> stream.filter(StringUtil::isNotBlank).map(s -> {
                    final String[] pair = s.split("=");
                    if (pair.length == 1) {