}

    @Override
    public CacheStats stats() {
      SimpleStatsCounter aggregator = new SimpleStatsCounter();
      aggregator.incrementBy(localCache.globalStatsCounter);
      for (Segment<K, V> segment : localCache.segments) {
        aggregator.incrementBy(segment.statsCounter);
      }
      return aggregator.snapshot();
    }

    @Override
    public void cleanUp() {

    entry.setValueReference(valueRef);

    // absent
    assertThat(segment.removeLoadingValue(key, hash, valueRef)).isFalse();

    // live
    table.set(0, entry);
    // don't increment count; this is used during computation
    assertThat(segment.removeLoadingValue(key, hash, valueRef)).isTrue();
    // no notification sent with removeLoadingValue

    entry.setValueReference(valueRef);

    // absent
    assertThat(segment.removeLoadingValue(key, hash, valueRef)).isFalse();

    // live
    table.set(0, entry);
    // don't increment count; this is used during computation
    assertThat(segment.removeLoadingValue(key, hash, valueRef)).isTrue();
    // no notification sent with removeLoadingValue