clock in a twinkling!  Half-past one, time for dinner!'

  (`I only wish it was,' the March Hare said to itself in a
whisper.)

  `That would be grand, certainly,' said Alice thoughtfully:
`but then--I shouldn't be hungry for it, you know.'

  `Not at first, perhaps,' said the Hatter:  `but you could keep
it to half-past one as long as you liked.'

    }

    /**
     * Performs routine cleanup prior to executing a write. This should be called every time a write
     * thread acquires the segment lock, immediately after acquiring the lock.
     *
     * <p>Post-condition: expireEntries has been run.
     */
    @GuardedBy("this")
    void preWriteCleanup(long now) {
      runLockedCleanup(now);
    }

    /** Performs routine cleanup following a write. */

    dummyValue = new Object();
    dummyValueRef = map.newValueReference(dummy, dummyValue, 1);
    dummy.setValueReference(dummyValueRef);
    table.set(index, dummy);
    // returns the most recent entry
    assertSame(dummyValue, segment.get(key, hash));
    assertTrue(segment.containsKey(key, hash));
    assertTrue(segment.containsValue(value));
    assertTrue(segment.containsValue(dummyValue));

    dummyValue = new Object();
    dummyValueRef = map.newValueReference(dummy, dummyValue, 1);
    dummy.setValueReference(dummyValueRef);
    table.set(index, dummy);
    // returns the most recent entry
    assertSame(dummyValue, segment.get(key, hash));
    assertTrue(segment.containsKey(key, hash));
    assertTrue(segment.containsValue(value));
    assertTrue(segment.containsValue(dummyValue));

  private final TestLogHandler aggregateFutureLogHandler = new TestLogHandler();

  private static final String DATA1 = "data";
  private static final String DATA2 = "more data";
  private static final String DATA3 = "most data";

  @Override
  public void setUp() throws Exception {
    super.setUp();
    aggregateFutureLogger.addHandler(aggregateFutureLogHandler);
  }

  @Override

  private final TestLogHandler aggregateFutureLogHandler = new TestLogHandler();

  private static final String DATA1 = "data";
  private static final String DATA2 = "more data";
  private static final String DATA3 = "most data";

  @Override
  public void setUp() throws Exception {
    super.setUp();
    aggregateFutureLogger.addHandler(aggregateFutureLogHandler);
  }

  @Override

    }

    /**
     * Performs routine cleanup prior to executing a write. This should be called every time a write
     * thread acquires the segment lock, immediately after acquiring the lock.
     *
     * <p>Post-condition: expireEntries has been run.
     */
    @GuardedBy("this")
    void preWriteCleanup(long now) {
      runLockedCleanup(now);
    }

    /** Performs routine cleanup following a write. */

clock in a twinkling!  Half-past one, time for dinner!'

  (`I only wish it was,' the March Hare said to itself in a
whisper.)

  `That would be grand, certainly,' said Alice thoughtfully:
`but then--I shouldn't be hungry for it, you know.'

  `Not at first, perhaps,' said the Hatter:  `but you could keep
it to half-past one as long as you liked.'

 *   <li>by combining the results of several input steps.
 * </ul>
 *
 * Each derivation can capture the next value or any intermediate objects for later closing.
 *
 * <p>A step can be the input to at most one derived step. Once you transform its value, catch its
 * exception, or combine it with others, you cannot do anything else with it, including declare it
 * to be the last step of the pipeline.
 *
 * <h4>Transforming</h4>

          K extends @Nullable Object, V extends @Nullable Object>
      extends AbstractMap<K, V> {
    /**
     * Creates the entry set to be returned by {@link #entrySet()}. This method is invoked at most
     * once on a given map, at the time when {@code entrySet} is first called.
     */
    abstract Set<Entry<K, V>> createEntrySet();

    @LazyInit @CheckForNull private transient Set<Entry<K, V>> entrySet;