) {
    val names = alpnProtocolNames(protocols)

    try {
      val alpnProvider =
        Proxy.newProxyInstance(
          Platform::class.java.classLoader,
          arrayOf(clientProviderClass, serverProviderClass),
          AlpnProvider(names),
        )
      putMethod.invoke(null, sslSocket, alpnProvider)
    } catch (e: InvocationTargetException) {
      throw AssertionError("failed to set ALPN", e)