}
    checkArgument(!map.isEmpty());
    return getDeclaringClassOrObjectForJ2cl(map.keySet().iterator().next());
  }

  private static <V extends Enum<V>> Class<V> inferValueTypeOrObjectUnderJ2cl(Map<?, V> map) {
    if (map instanceof EnumBiMap) {
      return ((EnumBiMap<?, V>) map).valueTypeOrObjectUnderJ2cl;
    }
    checkArgument(!map.isEmpty());

        ongoing.remove(new TransferResourceIdentifier(event.getResource()));
        put(event, ongoing.isEmpty());
    }

    @Override
    public void transferFailed(TransferEvent event) {
        ongoing.remove(new TransferResourceIdentifier(event.getResource()));
        put(event, ongoing.isEmpty());
    }

    private static class Exchange {
        private final TransferEvent event;

                            .map(p -> "- " + p.getKey() + " on line " + kv.getKey() + " of " + path)
                    )
                    .collect(Collectors.toList())
            );
        }
        if (failures.isEmpty() == false) {
            throw new GradleException("Found invalid patterns:\n" + String.join("\n", failures));
        }

        File outputMarker = getOutputMarker();
        outputMarker.getParentFile().mkdirs();

    @Override
    protected SortedSet<Integer> create(Integer[] elements) {
      SortedSet<Integer> set = nullCheckedTreeSet(elements);
      int tooHigh = set.isEmpty() ? 0 : set.last() + 1;
      set.add(tooHigh);
      return checkedCreate(set).headSet(tooHigh);
    }
  }

  public static class ContiguousSetTailsetGenerator extends AbstractContiguousSetGenerator {

        Set<ApiChange> seenApiChanges = (Set<ApiChange>) context.getUserData().get("seenApiChanges");
        Set<ApiChange> left = new HashSet<>(acceptedApiChanges);
        left.removeAll(seenApiChanges);
        if (!left.isEmpty()) {
            String formattedLeft = CollectionUtils.join("\n", left);
            throw new RuntimeException("The following regressions are declared as accepted, but didn't match any rule:\n\n" + formattedLeft);
        }

  @Throws(InterruptedException::class)
  fun takeSink(): BufferedSink = requestBodySinks.poll(5, SECONDS) ?: throw AssertionError("no sink to take")

  fun assertNoMoreSinks() {
    assertTrue(requestBodySinks.isEmpty())
  }

    }

    @Subscribe
    public void subscriber(Object o) {
      subscriberEvents.add(o);
    }
  }

  public void testNonSubscriber() {
    assertThat(getSubscriber().nonSubscriberEvents).isEmpty();
  }

  public void testSubscriber() {
    assertThat(getSubscriber().subscriberEvents).contains(EVENT);
  }

  @Override
  Subscriber createSubscriber() {
    return new Subscriber();
  }

    PreOrderIterator(T root) {
      this.stack = new ArrayDeque<>();
      stack.addLast(singletonIterator(checkNotNull(root)));
    }

    @Override
    public boolean hasNext() {
      return !stack.isEmpty();
    }

    @Override
    public T next() {
      Iterator<T> itr = stack.getLast(); // throws NSEE if empty
      T result = checkNotNull(itr.next());
      if (!itr.hasNext()) {

  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(ONE)
  public void testSingletonMapPollFirst() {
    assertEquals(a, navigableMap.pollFirstEntry());
    assertTrue(navigableMap.isEmpty());
  }

  @CollectionSize.Require(ONE)
  public void testSingletonMapNearby() {
    assertNull(navigableMap.lowerEntry(k0()));
    assertNull(navigableMap.lowerKey(k0()));

  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(ONE)
  public void testSingletonSetPollFirst() {
    assertEquals(a, navigableSet.pollFirst());
    assertTrue(navigableSet.isEmpty());
  }

  @CollectionSize.Require(ONE)
  public void testSingletonSetNearby() {
    assertNull(navigableSet.lower(e0()));
    assertEquals(a, navigableSet.floor(e0()));