class YieldAndDiscountAddZeroFixedCurve extends YieldAndDiscountCurve {

  @Override
  public double getInterestRate(final Double t) {
    return _curve.getInterestRate(t) + _sign * _curveFixed.getInterestRate(t);
  }

  public  YieldAndDiscountAddZeroFixedCurve(final String name, final boolean substract, final YieldAndDiscountCurve curve, final YieldAndDiscountCurve curveFixed);

}