Create simple XML with StreamingMarkupBuilder (pretty-printed)

import groovy.xml.*
 
def createXML() {
    def xml = new groovy.xml.StreamingMarkupBuilder().bind(){
    mkp.xmlDeclaration()
    content() {
        parameter(x:0)        
        person(id:100){
          firstname("John")
          lastname("Long")
        }       
        person(id:101){
          firstname("Ken")
          lastname("Smith")
        }
      }    
    }
    XmlUtil.serialize(xml)
 }
 
def static main(def args) {
 def x = createXML()
 println x
}