server.enqueue(
      MockResponse
        .Builder()
        .headersDelay(2, TimeUnit.SECONDS)
        .build(),
    )
    client =
      client
        .newBuilder()
        .readTimeout(Duration.ofMillis(250))
        .build()
    val call =
      client.newCall(
        Request
          .Builder()
          .url(server.url("/"))
          .build(),
      )
    assertFailsWith<IOException> {

      ImmutableList.Builder<String> builder = ImmutableList.builder();
      assertThrows(NullPointerException.class, () -> builder.addAll((Iterable<String>) null));
    }

    {
      ImmutableList.Builder<String> builder = ImmutableList.builder();
      assertThrows(NullPointerException.class, () -> builder.addAll((Iterator<String>) null));
    }

    {
      ImmutableList.Builder<String> builder = ImmutableList.builder();

  public static <E> Builder<E> orderedBy(Comparator<E> comparator) {
    return new Builder<>(comparator);
  }

  /**
   * Returns a builder that creates immutable sorted sets whose elements are ordered by the reverse
   * of their natural ordering.
   */
  public static <E extends Comparable<?>> Builder<E> reverseOrder() {
    return new Builder<>(Collections.reverseOrder());
  }

  /**

  }

  public void testBuilderPutNullKey() {
    Builder<String, Integer> builder = ImmutableSortedMap.naturalOrder();
    assertThrows(NullPointerException.class, () -> builder.put(null, 1));
  }

  public void testBuilderPutNullValue() {
    Builder<String, Integer> builder = ImmutableSortedMap.naturalOrder();
    assertThrows(NullPointerException.class, () -> builder.put("one", null));
  }

  // At least, I assume that's why. TODO(cpovirk): Check, and maybe add a test for this.
  @SuppressWarnings("ThreadPriorityCheck") // We only propagate user requests (which we discourage).
  private static ThreadFactory doBuild(ThreadFactoryBuilder builder) {
    String nameFormat = builder.nameFormat;
    Boolean daemon = builder.daemon;
    Integer priority = builder.priority;

    @Override
    protected Map<String, String> create(Entry<String, String>[] entries) {
      ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
      for (Entry<String, String> entry : entries) {
        checkNotNull(entry);
        builder.put(entry.getKey(), entry.getValue());
      }
      return builder.buildOrThrow();
    }
  }

  public static class ImmutableMapCopyOfGenerator extends TestStringMapGenerator {

      ImmutableSet.Builder<ResourceInfo> builder = ImmutableSet.builder();
      scannedFiles.add(home);
      scan(home, scannedFiles, builder);
      return builder.build();
    }

    private void scan(File file, Set<File> scannedUris, ImmutableSet.Builder<ResourceInfo> builder)
        throws IOException {
      try {
        if (!file.exists()) {

      ImmutableSortedMultiset.Builder<String> builder = ImmutableSortedMultiset.naturalOrder();
      assertThrows(NullPointerException.class, () -> builder.addAll((Collection<String>) null));
    }

    {
      ImmutableSortedMultiset.Builder<String> builder = ImmutableSortedMultiset.naturalOrder();
      List<String> listWithNulls = asList("a", null, "b");
      assertThrows(NullPointerException.class, () -> builder.addAll(listWithNulls));
    }

      Collector.of(
          ImmutableList::builder,
          ImmutableList.Builder::add,
          ImmutableList.Builder::combine,
          ImmutableList.Builder::build);

  private static final Collector<Object, ?, ImmutableSet<Object>> TO_IMMUTABLE_SET =
      Collector.of(
          ImmutableSet::builder,
          ImmutableSet.Builder::add,
          ImmutableSet.Builder::combine,
          ImmutableSet.Builder::build);

      Collector.of(
          ImmutableList::builder,
          ImmutableList.Builder::add,
          ImmutableList.Builder::combine,
          ImmutableList.Builder::build);

  private static final Collector<Object, ?, ImmutableSet<Object>> TO_IMMUTABLE_SET =
      Collector.of(
          ImmutableSet::builder,
          ImmutableSet.Builder::add,
          ImmutableSet.Builder::combine,
          ImmutableSet.Builder::build);