docs: public void setSigmaSquared(double sigmaSq) {
      if (type == LogPriorType.ADAPT) { otherPrior.setSigmaSquared(sigmaSq); }
      else {
  //    this.sigma = Math.sqrt(sigmaSq);
        this.sigmaSq = sigmaSq;
        this.sigmaQu = sigmaSq * sigmaSq;
      }
    }