I don't know how Swedish courts work but in the United States all you can really do is privately ask the judge to recuse himself. If he chooses not to you can

I don't know how Swedish courts work but in the United States all you can really do is privately ask the judge to recuse himself. If he chooses not to you can request that be noted in the court record as possible grounds for an appeal and from there you go on with your case. So really all an attorney can do is wait things out and then present it as an appeal after the trial.