docs: public double getLowerBound(final int kappa) {
      if (!hasHip(mem)) {
        return getIconConfidenceLB(PreambleUtil.getLgK(mem), getNumCoupons(mem), kappa);
      }
      return getHipConfidenceLB(PreambleUtil.getLgK(mem), getNumCoupons(mem), getHipAccum(mem), kappa);
    }