/**
* @param spreadFunction The spread function, not null
* @param name The name of the curve
* @param curves The curves, not null, contains more than one curve
*/
public SpreadDoublesCurve(
final CurveSpreadFunction spreadFunction, final String name, final DoublesCurve... curves) {
super(name);
ArgumentChecker.notNull(curves, "curves");
ArgumentChecker.isTrue(curves.length > 1, "curves");
ArgumentChecker.notNull(spreadFunction, "spread operator");
_curves = curves;
_spreadFunction = spreadFunction;
_f = spreadFunction.evaluate(curves);
}