static final class ElementSet<E> extends ImmutableSet.Indexed<E> {
    private final List<Entry<E>> entries;
    // TODO(cpovirk): @Weak?
    private final Multiset<E> delegate;

    ElementSet(List<Entry<E>> entries, Multiset<E> delegate) {
      this.entries = entries;
      this.delegate = delegate;
    }

    @Override
    E get(int index) {
      return entries.get(index).getElement();
    }

    @Override

// in this StatefulSet.
message StatefulSetOrdinals {
  // start is the number representing the first replica's index. It may be used
  // to number replicas from an alternate index (eg: 1-indexed) over the default
  // 0-indexed names, or to orchestrate progressive movement of replicas from
  // one StatefulSet to another.
  // If set, replica indices will be in the range:

    }
    return true;
  }

  /**
   * Returns the non-negative index value of the alpha character {@code c}, regardless of case. Ie,
   * 'a'/'A' returns 0 and 'z'/'Z' returns 25. Non-alpha characters return a value of 26 or greater.
   */
  private static int getAlphaIndex(char c) {
    // Fold upper-case ASCII to lower-case and make zero-indexed and unsigned (by casting to char).
    return (char) ((c | CASE_MASK) - 'a');
  }

    return (delegate != null) ? delegate.containsKey(key) : indexOf(key) != -1;
  }

  @Override
  @CheckForNull
  public V get(@CheckForNull Object key) {
    Map<K, V> delegate = delegateOrNull();
    if (delegate != null) {
      return delegate.get(key);
    }
    int index = indexOf(key);
    if (index == -1) {
      return null;
    }
    accessEntry(index);
    return value(index);
  }

    }
    return true;
  }

  /**
   * Returns the non-negative index value of the alpha character {@code c}, regardless of case. Ie,
   * 'a'/'A' returns 0 and 'z'/'Z' returns 25. Non-alpha characters return a value of 26 or greater.
   */
  private static int getAlphaIndex(char c) {
    // Fold upper-case ASCII to lower-case and make zero-indexed and unsigned (by casting to char).
    return (char) ((c | CASE_MASK) - 'a');
  }

		b.ReportAllocs()
		b.ResetTimer()
		b.SetBytes(855) // number of versions...
		for i := 0; i < b.N; i++ {
			err = xl.Load(data)
			if err != nil {
				b.Fatal(err)
			}
		}
	})

	b.Run("indexed", func(b *testing.B) {
		var xl xlMetaV2
		err = xl.Load(data)
		if err != nil {
			b.Fatal(err)
		}
		data, err := xl.AppendTo(nil)
		if err != nil {
			b.Fatal(err)
		}
		b.ReportAllocs()

    TFE_TensorDebugInfo* debug_info);

// Returns the number of elements in dimension `dim_index`.
// Tensor representation on device can be transposed from its representation
// on host. The data contained in dimension `dim_index` on device
// can correspond to the data contained in another dimension in on-host
// representation. The dimensions are indexed using the standard TensorFlow
// major-to-minor order (slowest varying dimension first),

        // if already there we remove it and add again
        int index = attachedArtifacts.indexOf(artifact);
        if (index >= 0) {
            LOGGER.warn("artifact '{}' already attached, replacing previous instance", artifact);
            attachedArtifacts.set(index, artifact);
        } else {
            attachedArtifacts.add(artifact);
        }
    }

    /**

    }

    @Override
    public int indexOf(@CheckForNull Object object) {
      int index = forwardList.lastIndexOf(object);
      return (index >= 0) ? reverseIndex(index) : -1;
    }

    @Override
    public int lastIndexOf(@CheckForNull Object object) {
      int index = forwardList.indexOf(object);
      return (index >= 0) ? reverseIndex(index) : -1;
    }

    @Override

  public final <K> ImmutableListMultimap<K, @NonNull E> index(Function<? super E, K> keyFunction) {
    return Multimaps.index((Iterable<@NonNull E>) getDelegate(), keyFunction);
  }

  /**
   * Returns a map with the contents of this {@code FluentIterable} as its {@code values}, indexed
   * by keys derived from those values. In other words, each input value produces an entry in the