val maxConcurrentStreamsUpdated = CountDownLatch(1)
    val maxConcurrentStreams = AtomicInteger()
    val listener: Http2Connection.Listener =
      object : Http2Connection.Listener() {
        override fun onStream(stream: Http2Stream): Unit = throw AssertionError()

        override fun onSettings(
          connection: Http2Connection,
          settings: Settings,
        ) {