return true;
          }
        }
        return false;
      }
    }

    @Override
    public boolean removeAll(Collection<?> c) {
      try {
        return super.removeAll(checkNotNull(c));
      } catch (UnsupportedOperationException e) {
        Set<K> toRemove = Sets.newHashSet();
        for (Entry<K, V> entry : map().entrySet()) {

    map.put("foo", "bar");
    map.put("baz", "bar");
    map.put("quux", "quux");
    assertFalse(map.values() instanceof Set);
    assertTrue(map.values().removeAll(ImmutableSet.of("bar")));
    assertEquals(1, map.size());
  }

  public void testComputeIfAbsent_RemovalListener() {
    List<RemovalNotification<Object, Object>> notifications = new ArrayList<>();

    map.put("foo", "bar");
    map.put("baz", "bar");
    map.put("quux", "quux");
    assertFalse(map.values() instanceof Set);
    assertTrue(map.values().removeAll(ImmutableSet.of("bar")));
    assertEquals(1, map.size());
  }

  public void testCopyEntry_computing() {
    final CountDownLatch startSignal = new CountDownLatch(1);