Class Attribute

// Reads the first and last name of each person and adds a new attribute with // the full name. let xml = '<roster>' +     '<person first="John" last="Doe"/>' +     '<person first="Mary" last="Smith"/>' +     '</roster>'; const document = XmlService.parse(xml); const people = document.getRootElement().getChildren('person'); for (let i = 0; i < people.length; i++) {   const person = people[i];   const firstName = person.getAttribute('first').getValue();   const lastName = person.getAttribute('last').getValue();   person.setAttribute('full', `${firstName} ${lastName}`); } xml = XmlService.getPrettyFormat().format(document); Logger.log(xml);