@Override
    public XorBitFunction copy() {
        return new XorBitFunction(getLabel(),
                                  getLevelOrNull(),
                                  args().stream().map(arg -> arg.copy()).toList());
    }
Constructs a new instance of this class.

@param exp     The expression to evaluate.
@param numBits The number of bits of the expression value to xor.
container-search/src/main/java/com/yahoo/search/grouping/request/XorBitFunction.java