return new Iterator<Entry<K, V>>() {
      @Nullable ValueEntry<K, V> nextEntry = multimapIterationChain.firstEntry;
      @Nullable ValueEntry<K, V> toRemove;

      @Override
      public boolean hasNext() {
        return nextEntry != null;
      }

      @Override
      public Entry<K, V> next() {
        ValueEntry<K, V> entry = nextEntry;
        if (entry == null) {
          throw new NoSuchElementException();

      lastEntry = nextEntry;
      nextEntry = null;
      return new WriteThroughEntry(lastEntry.getKey(), lastEntry.getValue().getValue());
    }

    @Override
    public boolean hasNext() {
      if (nextEntry == null) {
        while (iterator.hasNext()) {
          Entry<K, Timestamped<V>> next = iterator.next();
          if (!isExpired(next.getValue())) {
            nextEntry = next;
            return true;

   * (pointing to the nextEntry entry in the linked list). The pointers in [size(), entries.length)
   * are all "null" (UNSET).
   *
   * <p>A node with "prev" pointer equal to {@code ENDPOINT} is the first node in the linked list,
   * and a node with "nextEntry" pointer equal to {@code ENDPOINT} is the last node.
   */
  @VisibleForTesting transient long[] links;

    }

    /** Finds the next entry in the current chain. Returns {@code true} if an entry was found. */
    boolean nextInChain() {
      if (nextEntry != null) {
        for (nextEntry = nextEntry.getNext(); nextEntry != null; nextEntry = nextEntry.getNext()) {
          if (advanceTo(nextEntry)) {
            return true;
          }
        }
      }
      return false;
    }