*
   * @param sendConnectionPreface true to send connection preface frames. This should always be true
   *     except for in tests that don't check for a connection preface.
   * @param taskRunner the TaskRunner to use, daemon by default.
   */
  @Throws(IOException::class)
  @JvmOverloads
  fun start(sendConnectionPreface: Boolean = true) {
    if (sendConnectionPreface) {
      writer.connectionPreface()