def referenceClosure = {
    html {
         body {
             h1 "hello"
         }
     }
}

def markupBuilder(closure) {
    new StringWriter().with{new groovy.xml.MarkupBuilder(it).with(closure); it.toString()}
}
def streamingMarkupBuilder(closure) {
    new groovy.xml.StreamingMarkupBuilder().bind(closure).toString()
}
def prettyStreamingMarkupBuilder(closure) {
    groovy.xml.XmlUtil.serialize(new groovy.xml.StreamingMarkupBuilder().bind(closure))
}


println markupBuilder(referenceClosure)
println streamingMarkupBuilder(referenceClosure)
println prettyStreamingMarkupBuilder(referenceClosure)