segment.clear();
    }
  }

  @LazyInit transient @Nullable Set<K> keySet;

  @Override
  public Set<K> keySet() {
    Set<K> ks = keySet;
    return (ks != null) ? ks : (keySet = new KeySet());
  }

  @LazyInit transient @Nullable Collection<V> values;

  @Override
  public Collection<V> values() {
    Collection<V> vs = values;

      segment.clear();
    }
  }

  @LazyInit transient @Nullable Set<K> keySet;

  @Override
  public Set<K> keySet() {
    Set<K> ks = keySet;
    return (ks != null) ? ks : (keySet = new KeySet());
  }

  @LazyInit transient @Nullable Collection<V> values;

  @Override
  public Collection<V> values() {
    Collection<V> vs = values;

      remove(key);
    }
  }

  @LazyInit @RetainedWith @Nullable Set<K> keySet;

  @Override
  public Set<K> keySet() {
    // does not impact recency ordering
    Set<K> ks = keySet;
    return (ks != null) ? ks : (keySet = new KeySet());
  }

  @LazyInit @RetainedWith @Nullable Collection<V> values;

  @Override
  public Collection<V> values() {
    // does not impact recency ordering

      remove(key);
    }
  }

  @LazyInit @RetainedWith @Nullable Set<K> keySet;

  @Override
  public Set<K> keySet() {
    // does not impact recency ordering
    Set<K> ks = keySet;
    return (ks != null) ? ks : (keySet = new KeySet());
  }

  @LazyInit @RetainedWith @Nullable Collection<V> values;

  @Override
  public Collection<V> values() {
    // does not impact recency ordering

     * NavigableMap methods.
     */

    private final NavigableSet<K> set;
    private final Function<? super K, V> function;

    NavigableAsMapView(NavigableSet<K> ks, Function<? super K, V> vFunction) {
      this.set = checkNotNull(ks);
      this.function = checkNotNull(vFunction);
    }

    @Override
    public NavigableMap<K, V> subMap(
        @ParametricNullness K fromKey,

     * NavigableMap methods.
     */

    private final NavigableSet<K> set;
    private final Function<? super K, V> function;

    NavigableAsMapView(NavigableSet<K> ks, Function<? super K, V> vFunction) {
      this.set = checkNotNull(ks);
      this.function = checkNotNull(vFunction);
    }

    @Override
    public NavigableMap<K, V> subMap(
        @ParametricNullness K fromKey,