strconv.FormatInt(bytesProcessed, 10) + `</BytesProcessed><BytesReturned>` +
		strconv.FormatInt(bytesReturned, 10) + `</BytesReturned></Stats>`)
	return genMessage(statsHeader, payload)
}

// endMessage - indicates that the request is complete, and no more messages will be sent.
// You should not assume that the request is complete until the client receives an End message.
//
// Header specification:

        override fun onOpen(
          webSocket: WebSocket,
          response: Response,
        ) = TODO()

        override fun onMessage(
          webSocket: WebSocket,
          text: String,
        ) = TODO()

        override fun onMessage(
          webSocket: WebSocket,
          bytes: ByteString,
        ) = TODO()

        override fun onClosing(

    clientListener.assertOpen()
    val server = serverListener.assertOpen()
    val e = RuntimeException()
    clientListener.setNextEventDelegate(
      object : WebSocketListener() {
        override fun onMessage(
          webSocket: WebSocket,
          text: String,
        ): Unit = throw e
      },
    )
    server.send("Hello, WebSockets!")
    clientListener.assertFailure(e)

	public fun onClosing (Lokhttp3/WebSocket;ILjava/lang/String;)V
	public fun onFailure (Lokhttp3/WebSocket;Ljava/lang/Throwable;Lokhttp3/Response;)V
	public fun onMessage (Lokhttp3/WebSocket;Ljava/lang/String;)V
	public fun onMessage (Lokhttp3/WebSocket;Lokio/ByteString;)V
	public fun onOpen (Lokhttp3/WebSocket;Lokhttp3/Response;)V

    <root-XML localName="ONIXMessage" namespaceURI="http://ns.editeur.org/onix/3.0/reference"/>
    <!-- do we want a separate mime for this? -->
    <root-XML localName="ONIXmessage" namespaceURI="http://ns.editeur.org/onix/3.0/short"/>
    <root-XML localName="ONIXMessage"/>
    <sub-class-of type="application/xml"/>
  </mime-type>