public boolean hasAggregations() {
        return aggregationAggregationBuilderList != null && !aggregationAggregationBuilderList.isEmpty();
    }

    public List<AbstractAggregationBuilder<?>> getAggregationBuilderList() {
        return aggregationAggregationBuilderList != null ? aggregationAggregationBuilderList : Collections.emptyList();
    }

    public boolean hasAggregations() {
        return aggregationAggregationBuilderList != null && !aggregationAggregationBuilderList.isEmpty();
    }

    public List<AbstractAggregationBuilder<?>> getAggregationBuilderList() {
        return aggregationAggregationBuilderList != null ? aggregationAggregationBuilderList : Collections.emptyList();
    }

  }

  @Override
  public int size() {
    return map.size();
  }

  @Override
  public UnmodifiableIterator<K> iterator() {
    return map.keyIterator();
  }

  @Override
  public Spliterator<K> spliterator() {
    return map.keySpliterator();
  }

  @Override
  public boolean contains(@CheckForNull Object object) {
    return map.containsKey(object);
  }

  @Override

			kubeClient, err := ctx.CLIClientWithRevision(opts.Revision)
			if err != nil {
				return err
			}
			res, err := kubeClient.AllDiscoveryDo(context.Background(), ctx.IstioNamespace(), "debug/clusterz")
			if err != nil {
				return err
			}
			return writeMulticlusterStatus(cmd.OutOrStdout(), res)
		},
	}
	opts.AttachControlPlaneFlags(cmd)
	return cmd
}

func writeMulticlusterStatus(out io.Writer, input map[string][]byte) error {

            if (Constants.GET_METHOD.equalsIgnoreCase(method)) {
                return get();
            }
            if (Constants.HEAD_METHOD.equalsIgnoreCase(method)) {
                return head();
            }
            if (Constants.POST_METHOD.equalsIgnoreCase(method)) {
                return post();
            }
            return get();
        }

        public RequestDataContext method(final Method method) {

-N ISTIO_IN_REDIRECT
-N ISTIO_OUTPUT
-A ISTIO_INBOUND -p tcp --dport 15008 -j RETURN
-A ISTIO_REDIRECT -p tcp -j REDIRECT --to-ports 15001
-A ISTIO_IN_REDIRECT -p tcp -j REDIRECT --to-ports 15006
-A PREROUTING -p tcp -j ISTIO_INBOUND
-A ISTIO_INBOUND -p tcp --dport 15020 -j RETURN
-A ISTIO_INBOUND -p tcp --dport 15021 -j RETURN
-A ISTIO_INBOUND -p tcp --dport 15090 -j RETURN
-A ISTIO_INBOUND -p tcp -j ISTIO_IN_REDIRECT
-A OUTPUT -p tcp -j ISTIO_OUTPUT

        if (this instanceof DcerpcPipeHandle)
            return ((DcerpcPipeHandle)this).pipe.getServer();
        return null;
    }
    public Principal getPrincipal() {
        if (this instanceof DcerpcPipeHandle)
            return ((DcerpcPipeHandle)this).pipe.getPrincipal();
        return null;
    }
    public String toString() {
        return binding.toString();
    }

  UnmodifiableIterator<K> keyIterator() {
    return Iterators.unmodifiableIterator(delegate.keySet().iterator());
  }

  @Override
  Spliterator<K> keySpliterator() {
    return delegate.keySet().spliterator();
  }

  @Override
  public int size() {
    return delegate.size();
  }

  @Override
  public boolean containsKey(@CheckForNull Object key) {
    return delegate.containsKey(key);
  }

  @Override

  }

  /**
   * Used by tests that require a map, but don't care whether it's populated or not.
   *
   * @return a new map instance.
   */
  protected Map<K, V> makeEitherMap() {
    try {
      return makePopulatedMap();
    } catch (UnsupportedOperationException e) {
      return makeEmptyMap();
    }
  }

  protected final boolean supportsValuesHashCode(Map<K, V> map) {

	if err != nil {
		return "", err
	}

	if cfg.ChainedCNIPlugin {
		if !file.Exists(cniConfigFilepath) {
			return "", fmt.Errorf("CNI config file %s removed during configuration", cniConfigFilepath)
		}
		// This section overwrites an existing plugins list entry for istio-cni
		existingCNIConfig, err := os.ReadFile(cniConfigFilepath)
		if err != nil {
			return "", err
		}