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

    <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>

	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