int currentIndex = firstEntryIndex();
      int indexToRemove = -1;

      @Override
      public boolean hasNext() {
        return currentIndex >= 0;
      }

      @Override
      @ParametricNullness
      public E next() {
        checkForConcurrentModification();
        if (!hasNext()) {
          throw new NoSuchElementException();
        }
        indexToRemove = currentIndex;

    for (V value : valueCollection) {
      assertTrue(map.containsValue(value));
      assertTrue(allowsNullValues || (value != null));
    }

    assertEquals(map.size(), entrySet.size());
    assertEquals(entrySet.size() == 0, entrySet.isEmpty());
    assertEquals(!entrySet.isEmpty(), entrySet.iterator().hasNext());
    assertEntrySetNotContainsString(entrySet);

   * documentation).
   */
  public boolean isOrdered(Iterable<? extends T> iterable) {
    Iterator<? extends T> it = iterable.iterator();
    if (it.hasNext()) {
      T prev = it.next();
      while (it.hasNext()) {
        T next = it.next();
        if (compare(prev, next) > 0) {
          return false;
        }
        prev = next;
      }
    }
    return true;
  }

      if (backingItr.hasNext()
          && upperBoundWindow.upperBound.isLessThan(backingItr.peek().upperBound)) {
        backingItr.next();
      }
      return new AbstractIterator<Entry<Cut<C>, Range<C>>>() {
        @Override
        protected @Nullable Entry<Cut<C>, Range<C>> computeNext() {
          if (!backingItr.hasNext()) {
            return endOfData();
          }

        if (r1.size() != r2.size()) {
            return false;
        }

        for (Iterator<RemoteRepository> it1 = r1.iterator(), it2 = r2.iterator(); it1.hasNext(); ) {
            if (!repositoryEquals(it1.next(), it2.next())) {
                return false;
            }
        }

        return true;
    }

      Iterator<Map.Entry<E, Integer>> backingIterator = countMap.entrySet().iterator();
      return new Iterator<Entry<E>>() {
        @Override
        public boolean hasNext() {
          return backingIterator.hasNext();
        }

        @Override
        public Multiset.Entry<E> next() {
          Map.Entry<E, Integer> backingEntry = backingIterator.next();

        }

        @Override
        public boolean hasNext() {
          return forwardIterator.hasPrevious();
        }

        @Override
        public boolean hasPrevious() {
          return forwardIterator.hasNext();
        }

        @Override
        @ParametricNullness
        public T next() {
          if (!hasNext()) {
            throw new NoSuchElementException();
          }

    int indexToRemove = -1;

    @Override
    public boolean hasNext() {
      return currentIndex >= 0;
    }

    @ParametricNullness
    abstract T getOutput(int entry);

    @Override
    @ParametricNullness
    public T next() {
      checkForConcurrentModification();
      if (!hasNext()) {
        throw new NoSuchElementException();
      }

          }
        }

        @Override
        public boolean hasNext() {
          checkForComodification();
          return index != ENDPOINT && remaining > 0;
        }

        @Override
        @ParametricNullness
        public T next() {
          if (!hasNext()) {
            throw new NoSuchElementException();
          }
          T result = forEntry(index);

  UnmodifiableIterator<K> keyIterator() {
    UnmodifiableIterator<Entry<K, V>> entryIterator = entrySet().iterator();
    return new UnmodifiableIterator<K>() {
      @Override
      public boolean hasNext() {
        return entryIterator.hasNext();
      }

      @Override
      public K next() {
        return entryIterator.next().getKey();
      }
    };
  }