class SpreadDoublesCurve extends DoublesCurve {

  public DoublesCurve[] getUnderlyingCurves() {
    return _curves;
  }

  protected  SpreadDoublesCurve();
  public  SpreadDoublesCurve(final CurveSpreadFunction spreadFunction, final DoublesCurve... curves);
  public  SpreadDoublesCurve(final CurveSpreadFunction spreadFunction, final String name, final DoublesCurve... curves);

}