code: public XObject operate(XObject right) throws javax.xml.transform.TransformerException
    {
      return (XString)right.xstr(); // semi-safe cast.
    }
docs: Apply the operation to two operands, and return the result.
  
  
  @param right non-null reference to the evaluated right operand.
  
  @return non-null reference to the XObject that represents the result of the operation.
  
  @throws javax.xml.transform.TransformerException