}

  @LazyInit private transient @Nullable Set<Entry<K, V>> entrySetView;

  @Override
  public Set<Entry<K, V>> entrySet() {
    return (entrySetView == null) ? entrySetView = createEntrySet() : entrySetView;
  }

  Set<Entry<K, V>> createEntrySet() {
    return new EntrySetView();
  }

  @WeakOuter
  private final class EntrySetView extends AbstractSet<Entry<K, V>> {
    @Override