peer.sendFrame().ping(true, Http2Connection.AWAIT_PING, 0) // PONG
    peer.play()

    // Play it back.
    val connection = connect(peer)
    val stream = connection.newStream(headerEntries("a", "artichaut"), false)
    connection.writePingAndAwaitPong()
    assertThat(stream.takeHeaders()).isEqualTo(headersOf("headers", "bam"))

    return vector.elements();
  }

  public void testToString() {
    Iterator<String> iterator = Lists.newArrayList("yam", "bam", "jam", "ham").iterator();
    assertThat(Iterators.toString(iterator)).isEqualTo("[yam, bam, jam, ham]");
  }

  public void testToStringWithNull() {
    Iterator<@Nullable String> iterator =

    return vector.elements();
  }

  public void testToString() {
    Iterator<String> iterator = Lists.newArrayList("yam", "bam", "jam", "ham").iterator();
    assertThat(Iterators.toString(iterator)).isEqualTo("[yam, bam, jam, ham]");
  }

  public void testToStringWithNull() {
    Iterator<@Nullable String> iterator =