length = 4,
        type = TYPE_WINDOW_UPDATE,
        flags = FLAG_NONE,
      )
      sink.writeInt(windowSizeIncrement.toInt())
      sink.flush()
    }
  }

  @Throws(IOException::class)
  fun frameHeader(
    streamId: Int,
    length: Int,
    type: Int,
    flags: Int,
  ) {
    if (type != TYPE_WINDOW_UPDATE && logger.isLoggable(FINE)) {

              ) {
                // Flow control: notify the peer that we're ready for more data! Only send a
                // WINDOW_UPDATE if the stream isn't in error.
                connection.writeWindowUpdateLater(id, unacknowledgedBytesRead)
                readBytes.update(acknowledged = unacknowledgedBytesRead)
              }
            } else if (!finished && errorExceptionToDeliver == null) {

      val stream = streams.remove(streamId)

      // The removed stream may be blocked on a connection-wide window update.
      condition.signalAll()

      return stream
    }
  }

  internal fun updateConnectionFlowControl(read: Long) {
    this.withLock {
      readBytes.update(total = read)
      val readBytesToAcknowledge = readBytes.unacknowledged

      peer.sendFrame().data(false, 3, data(24), 24)
      peer.sendFrame().data(false, 3, data(25), 25)
      peer.sendFrame().data(false, 3, data(1), 1)
      peer.acceptFrame() // connection WINDOW UPDATE
      peer.acceptFrame() // stream WINDOW UPDATE
    }
    peer.sendFrame().data(true, 3, data(0), 0)
    peer.play()

    // Play it back.
    val connection = connect(peer)