boolean accessOrder,
        long maximumSize,
        StatsCounter statsCounter,
        @Nullable RemovalListener<? super K, ? super V> removalListener) {
      super(initialCapacity, loadFactor, accessOrder);
      this.maximumSize = maximumSize;
      this.statsCounter = statsCounter;
      this.removalListener = removalListener;
    }

    @Override
    protected boolean removeEldestEntry(Entry<K, Timestamped<V>> ignored) {

            .removalListener(removalListener)
            .ticker(ticker)
            .build(loader);
    runRemovalScheduler(cache, removalListener, loader, ticker, KEY_PREFIX, EXPIRING_TIME);
  }

  public void testRemovalScheduler_expireAfterBoth() {
    FakeTicker ticker = new FakeTicker();
    CountingRemovalListener<String, Integer> removalListener = countingRemovalListener();

  }

  public void testEviction_maxSize() {
    CountingRemovalListener<Integer, Integer> removalListener = countingRemovalListener();
    IdentityLoader<Integer> loader = identityLoader();
    LoadingCache<Integer, Integer> cache =
        CacheBuilder.newBuilder()
            .maximumSize(MAX_SIZE)
            .removalListener(removalListener)
            .build(loader);
    for (int i = 0; i < 2 * MAX_SIZE; i++) {

  }

  public void testRemovalListener_setTwice() {
    RemovalListener<Object, Object> testListener = nullRemovalListener();
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().removalListener(testListener);
    assertThrows(IllegalStateException.class, () -> builder.removalListener(testListener));
  }

  public void testValuesIsNotASet() {

  }

  public void testRemovalListener_setTwice() {
    RemovalListener<Object, Object> testListener = nullRemovalListener();
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().removalListener(testListener);
    assertThrows(IllegalStateException.class, () -> builder.removalListener(testListener));
  }

  public void testValuesIsNotASet() {

    assertEquals("keyEquivalence", a.keyEquivalence, b.keyEquivalence);
    assertEquals("keyStrength", a.keyStrength, b.keyStrength);
    assertEquals("removalListener", a.removalListener, b.removalListener);
    assertEquals("weigher", a.weigher, b.weigher);
    assertEquals("valueEquivalence", a.valueEquivalence, b.valueEquivalence);
    assertEquals("valueStrength", a.valueStrength, b.valueStrength);

    assertEquals(Integer.valueOf(50), asMap.get(10));
  }

  public void testRemovalListener() {
    int[] stats = new int[4];

    RemovalListener<Integer, Integer> countingListener =
        new RemovalListener<Integer, Integer>() {
          @Override
          public void onRemoval(RemovalNotification<Integer, Integer> notification) {
            switch (notification.getCause()) {

    assertEquals("keyEquivalence", a.keyEquivalence, b.keyEquivalence);
    assertEquals("keyStrength", a.keyStrength, b.keyStrength);
    assertEquals("removalListener", a.removalListener, b.removalListener);
    assertEquals("weigher", a.weigher, b.weigher);
    assertEquals("valueEquivalence", a.valueEquivalence, b.valueEquivalence);
    assertEquals("valueStrength", a.valueStrength, b.valueStrength);

            listeners.add(listener);
        }
    }

    /**
     * Remove a listener
     *
     * @param listener the listener to remove
     */
    public void removeListener(CircuitBreakerListener listener) {
        listeners.remove(listener);
    }

    /**
     * Get circuit breaker metrics
     *
     * @return metrics snapshot
     */