}

  final class KeySet extends View<K, V, K> {
    KeySet() {
      super(HashBiMap.this);
    }

    @Override
    @ParametricNullness
    K forEntry(int entry) {
      // The cast is safe because we call forEntry only for indexes that contain entries.
      return uncheckedCastNullableTToT(keys[entry]);
    }

    @Override
    public boolean contains(@CheckForNull Object o) {

        UnsupportedOperationException.class, () -> barEntry.setValue(Arrays.<Integer>asList()));
    entries.remove(); // clear
    Entry<String, Collection<Integer>> fooEntry = entries.next();
    assertEquals("foo", fooEntry.getKey());
    assertThat(fooEntry.getValue()).contains(2);
    assertFalse(entries.hasNext());
    assertEquals("{foo=[2]}", map.toString());
  }

  public void testEntriesAfterMultimapUpdate() {