}

  /**
   * Specifies that active entries are eligible for automatic refresh once a fixed duration has
   * elapsed after the entry's creation, or the most recent replacement of its value. The semantics
   * of refreshes are specified in {@link LoadingCache#refresh}, and are performed by calling {@link
   * CacheLoader#reload}.
   *
   * <p>As the default implementation of {@link CacheLoader#reload} is synchronous, it is

    /**
     * Configure a single client scoped listener that will receive all analytic events for this
     * client.
     *
     * @see EventListener for semantics and restrictions on listener implementations.
     */
    fun eventListener(eventListener: EventListener) =
      apply {
        this.eventListenerFactory = eventListener.asFactory()
      }

    /**

  // propagate to the input. Cancellation propagation is fundamentally racy so this is fine.
  //
  // Future versions of the JMM may revise safe construction semantics in such a way that we can
  // safely publish these objects and we won't need this whole discussion.
  // TODO(user,lukes): consider adding volatile to all these fields since in current known JVMs

     * @since 20.0 (present with return type {@link Iterator} since 2.0)
     */
    @Override
    public abstract UnmodifiableIterator<E> iterator();

    @Override
    @SuppressWarnings("EqualsHashCode") // same semantics
    public boolean equals(@Nullable Object object) {
      if (object == this) {
        return true;
      }
      if (!(object instanceof Set)) {
        return false;
      }