class HestonCharacteristicExponent implements MartingaleCharacteristicExponent {

  public HestonCharacteristicExponent withOmega(final double omega) {
    return new HestonCharacteristicExponent(_kappa, _theta, _vol0, omega, _rho);
  }

  public  HestonCharacteristicExponent(final double kappa, final double theta, final double vol0, final double omega, final double rho);
  public  HestonCharacteristicExponent(final HestonModelData data);

}