double mu = 0.133333;
double theta = 0.16;
double p = ShiftedLogNormalTailExtrapolation.price(f, k, t, true, mu, theta);
double dd = ShiftedLogNormalTailExtrapolation.dualDelta(f, k, t, true, mu, theta);
System.out.println("price and DD " + p + "\t" + dd);
System.out.println("trans " + trans.inverseTransform(-2.2521684610628063));
double[] res = fitter.fitPriceAndGrad(f, k, p, dd, t, true);
assertEquals("mu ", mu, res[0], 1e-8);
assertEquals("theta", theta, res[1], 1e-8);
}