* be updated after modifications to {@code graph}.
   *
   * @since 33.1.0 (present with return type {@code Graph} since 20.0)
   */
  // TODO(b/31438252): Consider potential optimizations for this algorithm.
  public static <N> ImmutableGraph<N> transitiveClosure(Graph<N> graph) {
    ImmutableGraph.Builder<N> transitiveClosure =

   * enforce any particular rules with regards to line folding as stated in the class docs.
   */
  private static final CharMatcher LINEAR_WHITE_SPACE = CharMatcher.anyOf(" \t\r\n");

  // TODO(gak): make these public?
  private static final String APPLICATION_TYPE = "application";
  private static final String AUDIO_TYPE = "audio";
  private static final String IMAGE_TYPE = "image";

	if !bytes.HasPrefix(sig, []byte("x-amz-trailer-signature:")) {
		if cr.debug {
			fmt.Printf("prefix, want prefix %q, got %q", "x-amz-trailer-signature:", string(sig))
		}
		return errMalformedEncoding
	}

	// TODO: It seems like we may have to be prepared to rewrite and sort trailing headers:
	// https://docs.aws.amazon.com/IAM/latest/UserGuide/create-signed-request.html

	// Any value must end with a newline.

    input.putAll("foo", Arrays.<@Nullable Integer>asList(1, null, 3));
    assertThrows(
        NullPointerException.class,
        () -> ImmutableSetMultimap.copyOf((Multimap<String, Integer>) input));
  }

  // TODO(b/172823566): Use mainline testToImmutableSetMultimap once CollectorTester is usable.
  public void testToImmutableSetMultimap_java7_combine() {
    ImmutableSetMultimap.Builder<String, Integer> zis =

          <defaultValue>true</defaultValue>
          <type>boolean</type>
          <description>Whether to send notifications on warning.</description>
        </field>
        <!-- TODO: Remove it after continuum alpha-3 release -->
        <field>
          <name>address</name>
          <version>4.0.0+</version>
          <type>String</type>
          <description>

     * that can lead to NullPointerException. That's unfortunate. But hopefully most Kotlin callers
     * use `get(key) ?: defaultValue` instead of this method, anyway.
     */
    V result = get(key);
    // TODO(b/192579700): Use a ternary once it no longer confuses our nullness checker.
    if (result != null) {
      return result;
    } else {
      return defaultValue;
    }
  }

      if (success && !entry.zombie) {
        if (fileSystem.exists(dirty)) {
          val clean = entry.cleanFiles[i]
          fileSystem.atomicMove(dirty, clean)
          val oldLength = entry.lengths[i]
          // TODO check null behaviour
          val newLength = fileSystem.metadata(clean).size ?: 0
          entry.lengths[i] = newLength
          size = size - oldLength + newLength
        }
      } else {

    stream.defaultReadObject();
    int size = Serialization.readCount(stream);
    init(16); // resist hostile attempts to allocate gratuitous heap
    Serialization.populateMap(this, stream, size);
  }

  // TODO(cpovirk): Should we have a serialVersionUID here?

    val writer = Http2Writer(Buffer(), true)
    assertFailsWith<IllegalArgumentException> {
      writer.frameHeader(0, 16777216, Http2.TYPE_DATA, FLAG_NONE)
    }.also { expected ->
      // TODO: real max is based on settings between 16384 and 16777215
      assertThat(expected.message).isEqualTo("FRAME_SIZE_ERROR length > 16384: 16777216")
    }
  }

  @Test fun ackSettingsAppliesMaxFrameSize() {

    FROM_DECLARATION_AND_TYPE_USE_ANNOTATIONS {
      @Override
      boolean isNullable(Invokable<?, ?> invokable) {
        return FROM_DECLARATION_ANNOTATIONS_ONLY.isNullable(invokable)
        ;
        // TODO(cpovirk): Should we also check isNullableTypeVariable?
      }

      @Override
      boolean isNullable(Parameter param) {
        return FROM_DECLARATION_ANNOTATIONS_ONLY.isNullable(param)
        ;
      }