@Override
    public MathHypotFunction copy() {
        return new MathHypotFunction(getLabel(), getLevelOrNull(), getArg(0).copy(), getArg(1).copy());
    }
Constructs a new instance of this class.

@param x The expression to evaluate for x, double value will be requested.
@param y The expression to evaluate for y exponent, double value will be requested.
container-search/src/main/java/com/yahoo/search/grouping/request/MathHypotFunction.java