StringBuilder projectNames = new StringBuilder();
        Iterator<MavenProject> iterator = projects.iterator();
        while (iterator.hasNext()) {
            MavenProject project = iterator.next();
            projectNames.append(project.getGroupId()).append(":").append(project.getArtifactId());
            if (iterator.hasNext()) {
                projectNames.append(", ");
            }
        }

import org.jspecify.annotations.Nullable;

@GwtCompatible
abstract class IndexedImmutableSet<E> extends ImmutableSet<E> {
  abstract E get(int index);

  @Override
  public UnmodifiableIterator<E> iterator() {
    return asList().iterator();
  }

  @Override
  @GwtIncompatible
  int copyIntoArray(@Nullable Object[] dst, int offset) {
    return asList().copyIntoArray(dst, offset);
  }

  @Override

    }

    @Override
    public boolean include(Artifact artifact) {
        String id = artifact.getGroupId() + ":" + artifact.getArtifactId();

        boolean matched = false;
        for (Iterator<String> i = patterns.iterator(); i.hasNext() & !matched; ) {
            // TODO what about wildcards? Just specifying groups? versions?
            if (id.equals(i.next())) {
                matched = true;
            }
        }

        return new AbstractSet<EndpointPair<N>>() {
          @Override
          public Iterator<EndpointPair<N>> iterator() {
            return Iterators.transform(
                AbstractNetwork.this.edges().iterator(), edge -> incidentNodes(edge));
          }

          @Override
          public int size() {
            return AbstractNetwork.this.edges().size();

   * queue's iterator:
   *
   * {@snippet :
   * Queue<E> queue = Queues.synchronizedQueue(MinMaxPriorityQueue.<E>create());
   * ...
   * queue.add(element); // Needn't be in synchronized block
   * ...
   * synchronized (queue) { // Must synchronize on queue!
   *   Iterator<E> i = queue.iterator(); // Must be in synchronized block
   *   while (i.hasNext()) {

        AssertionFailedError.class,
        () ->
            assertEmpty(
                new Iterable<String>() {
                  @Override
                  public Iterator<String> iterator() {
                    return singleton("a").iterator();
                  }
                }));
  }

  public void testIsEmpty_map() {
    Map<Object, Object> map = new HashMap<>();
    assertEmpty(map);

        AssertionFailedError.class,
        () ->
            assertEmpty(
                new Iterable<String>() {
                  @Override
                  public Iterator<String> iterator() {
                    return singleton("a").iterator();
                  }
                }));
  }

  public void testIsEmpty_map() {
    Map<Object, Object> map = new HashMap<>();
    assertEmpty(map);

        if (availableChannels.isEmpty()) {
            throw new NoAvailableChannelException("No healthy channels available");
        }

        if (availableChannels.size() == 1) {
            return availableChannels.iterator().next();
        }

        switch (strategy) {
        case ROUND_ROBIN:
            return selectRoundRobin(availableChannels);

        case LEAST_LOADED:

    TreeMultimap<String, Integer> multimap = createPopulate();
    Iterator<Entry<String, Collection<Integer>>> iterator = multimap.asMap().entrySet().iterator();
    Entry<String, Collection<Integer>> entry = iterator.next();
    assertThat(entry.getKey()).isEqualTo("foo");
    assertThat(entry.getValue()).containsExactly(1, 3, 7);
    entry = iterator.next();
    assertThat(entry.getKey()).isEqualTo("google");

      return (delegate != null)
          ? delegate.keySet().remove(o)
          : CompactHashMap.this.removeHelper(o) != NOT_FOUND;
    }

    @Override
    public Iterator<K> iterator() {
      return keySetIterator();
    }

    @Override
    public Spliterator<K> spliterator() {
      if (needsAllocArrays()) {