docs: private static void updateHIP(final CpcSketch sketch, final int rowCol) {
      final int k = 1 << sketch.lgK;
      final int col = rowCol & 63;
      final double oneOverP = k / sketch.kxp;
      sketch.hipEstAccum += oneOverP;
      sketch.kxp -= invPow2(col + 1); // notice the "+1"
    }