throw AssertionError("failed to remove ALPN", e)
    }
  }

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? {
    try {
      val provider = Proxy.getInvocationHandler(getMethod.invoke(null, sslSocket)) as AlpnProvider
      if (!provider.unsupported && provider.selected == null) {
        log("ALPN callback dropped: HTTP/2 is disabled. " + "Is alpn-boot on the boot class path?")