return seekByValue(value, smearedHash(value)) != null;
  }

  @Override
  @CheckForNull
  public V get(@CheckForNull Object key) {
    return Maps.valueOrNull(seekByKey(key, smearedHash(key)));
  }

  @CanIgnoreReturnValue
  @Override
  @CheckForNull
  public V put(@ParametricNullness K key, @ParametricNullness V value) {
    return put(key, value, false);
  }

  static <K extends @Nullable Object> K keyOrNull(@CheckForNull Entry<K, ?> entry) {
    return (entry == null) ? null : entry.getKey();
  }

  @CheckForNull
  static <V extends @Nullable Object> V valueOrNull(@CheckForNull Entry<?, V> entry) {
    return (entry == null) ? null : entry.getValue();
  }

  static class SortedKeySet<K extends @Nullable Object, V extends @Nullable Object>

  static <K extends @Nullable Object> K keyOrNull(@CheckForNull Entry<K, ?> entry) {
    return (entry == null) ? null : entry.getKey();
  }

  @CheckForNull
  static <V extends @Nullable Object> V valueOrNull(@CheckForNull Entry<?, V> entry) {
    return (entry == null) ? null : entry.getValue();
  }

  static class SortedKeySet<K extends @Nullable Object, V extends @Nullable Object>