/* Should complain on attempt to remove() after peek(). */
    assertThrows(IllegalStateException.class, () -> peekingIterator.remove());

    assertEquals(
        "After remove() throws exception, peek should still be ok", "B", peekingIterator.peek());

    /* Should recover to be able to remove() after next(). */
    assertEquals("B", peekingIterator.next());
    peekingIterator.remove();

    runConcurrentlyMutatedTest(elements(1), ops(remove(), add(2)), wrap);

    runConcurrentlyMutatedTest(elements(1, 2), ops(remove(), remove()), wrap);

    runConcurrentlyMutatedTest(elements(1, 2), ops(remove(), nop()), wrap);

    runConcurrentlyMutatedTest(elements(1, 2), ops(remove(), add(3)), wrap);

    runConcurrentlyMutatedTest(elements(1, 2), ops(nop(), remove()), wrap);

   *
   * @param o element to be removed from this queue, if present
   * @return {@code true} if this queue changed as a result of the call
   */
  @CanIgnoreReturnValue // pushed down from class to method
  @Override
  public boolean remove(@Nullable Object o) {
    Monitor monitor = this.monitor;
    monitor.enter();
    try {
      return q.remove(o);
    } finally {
      monitor.leave();
    }

 * TLS_RSA_WITH_AES_128_CBC_SHA[²][http2_naughty]
 * TLS_RSA_WITH_AES_256_CBC_SHA[²][http2_naughty]
 * TLS_RSA_WITH_3DES_EDE_CBC_SHA[²][http2_naughty]
 * **REMOVED:** ~~TLS_DHE_RSA_WITH_AES_128_CBC_SHA~~
 * **REMOVED:** ~~TLS_DHE_RSA_WITH_AES_128_GCM_SHA256~~
 * **REMOVED:** ~~TLS_DHE_RSA_WITH_AES_256_CBC_SHA~~

[OkHttp 3.0][OkHttp30]
----------------------

_2016-01-13_

##### MODERN_TLS / COMPATIBLE_TLS cipher suites

    assertTrue("Could not remove larry", mmHeap.remove("larry"));
    assertEquals(6, mmHeap.size());
    assertFalse("heap contains larry which has been removed", mmHeap.contains("larry"));
    assertTrue("heap does not contain sergey", mmHeap.contains("sergey"));
    assertTrue("Could not remove larry", mmHeap.removeAll(Lists.newArrayList("sergey", "eric")));

        recurse(level + 1);
      }
    }
  }

  private void compareResultsForThisListOfStimuli() {
    int removes = frequency(asList(stimuli), remove);
    if ((!features.contains(IteratorFeature.SUPPORTS_REMOVE) && removes > 1)
        || (stimuli.length >= 5 && removes > 2)) {
      // removes are the most expensive thing to test, since they often throw exceptions with stack
      // traces, so we test them a bit less aggressively

        recurse(level + 1);
      }
    }
  }

  private void compareResultsForThisListOfStimuli() {
    int removes = frequency(asList(stimuli), remove);
    if ((!features.contains(IteratorFeature.SUPPORTS_REMOVE) && removes > 1)
        || (stimuli.length >= 5 && removes > 2)) {
      // removes are the most expensive thing to test, since they often throw exceptions with stack
      // traces, so we test them a bit less aggressively

      // We don't know whether these are still in the cache, so we can't assert on the return
      // values of these removes, but the cache should be empty after the removes, regardless.
      keys.remove(1);
      keys.remove(2);
      assertFalse(keys.remove(null));
      assertFalse(keys.remove(6));
      assertFalse(keys.remove(-6));
      assertFalse(keys.removeAll(asList(null, 0, 15, 1500)));

    }

    @Override
    public void remove() {
      valueIterator.remove();
      /*
       * requireNonNull is safe because we've already initialized `collection`. If we hadn't, then
       * valueIterator.remove() would have failed.
       */
      if (requireNonNull(collection).isEmpty()) {
        keyIterator.remove();
      }
      totalSize--;
    }
  }

  /**

/**
 * The reason why a cached entry was removed.
 *
 * @author Charles Fry
 * @since 10.0
 */
@GwtCompatible
public enum RemovalCause {
  /**
   * The entry was manually removed by the user. This can result from the user invoking {@link
   * Cache#invalidate}, {@link Cache#invalidateAll(Iterable)}, {@link Cache#invalidateAll()}, {@link
   * Map#remove}, {@link ConcurrentMap#remove}, or {@link Iterator#remove}.
   */
  EXPLICIT {