private volatile long autoIncrementStepNanos;

  /** Advances the ticker value by {@code time} in {@code timeUnit}. */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  @CanIgnoreReturnValue
  public FakeTicker advance(long time, TimeUnit timeUnit) {
    return advance(timeUnit.toNanos(time));
  }

  /** Advances the ticker value by {@code nanoseconds}. */

                return new Iterator<Entry<String, String>>() {
                    Entry<String, String> next;

                    {
                        advance();
                    }

                    private void advance() {
                        next = null;
                        while (iterator.hasNext()) {
                            Entry<Object, Object> e = iterator.next();

      <E extends @Nullable Object> void forEach(
          GeneralSpliterator<E> spliterator, Consumer<? super E> consumer) {
        spliterator.forEachRemaining(consumer);
      }
    },
    NO_SPLIT_TRY_ADVANCE {
      @Override
      <E extends @Nullable Object> void forEach(
          GeneralSpliterator<E> spliterator, Consumer<? super E> consumer) {
        while (spliterator.tryAdvance(consumer)) {
          // do nothing

    /** The key of the message: Advance */
    public static final String LABELS_ADVANCE = "{labels.advance}";

    /** The key of the message: Advanced Search */
    public static final String LABELS_advance_search_title = "{labels.advance_search_title}";

    /** The key of the message: All these words */
    public static final String LABELS_advance_search_must_queries = "{labels.advance_search_must_queries}";

    Object three = new Object();
    Object four = new Object();
    Object five = new Object();

    map.put(one, two);
    ticker.advance(1);
    map.put(two, three);
    ticker.advance(1);
    map.put(three, four);
    assertTrue(listener.isEmpty());
    ticker.advance(1);
    map.put(four, five);
    assertNotified(listener, one, two, RemovalCause.EXPIRED);

    assertTrue(listener.isEmpty());
  }

    Object three = new Object();
    Object four = new Object();
    Object five = new Object();

    map.put(one, two);
    ticker.advance(1);
    map.put(two, three);
    ticker.advance(1);
    map.put(three, four);
    assertTrue(listener.isEmpty());
    ticker.advance(1);
    map.put(four, five);
    assertNotified(listener, one, two, RemovalCause.EXPIRED);

    assertTrue(listener.isEmpty());
  }

                    if (upper == res2.getUpperBound()) {
                        // advance res2
                        if (i2.hasNext()) {
                            res2 = i2.next();
                        } else {
                            done = true;
                        }
                    } else {
                        // advance res1
                        if (i1.hasNext()) {

      }
      if (advanceSlowPointer) {
        slowPointer = slowPointer.getCause();
      }
      advanceSlowPointer = !advanceSlowPointer; // only advance every other iteration
    }
    return throwable;
  }

  /**
   * Gets a {@code Throwable} cause chain as a list. The first entry in the list will be {@code

      }
      if (advanceSlowPointer) {
        slowPointer = slowPointer.getCause();
      }
      advanceSlowPointer = !advanceSlowPointer; // only advance every other iteration
    }
    return throwable;
  }

  /**
   * Gets a {@code Throwable} cause chain as a list. The first entry in the list will be {@code

    list.add("b");
    Iterator<String> iterator = list.iterator();
    advance(iterator, 1);
    assertEquals("b", iterator.next());
  }

  public void testAdvance_pastEnd() {
    List<String> list = newArrayList();
    list.add("a");
    list.add("b");
    Iterator<String> iterator = list.iterator();
    advance(iterator, 5);
    assertFalse(iterator.hasNext());
  }