groovy-wslite transform syntax of request from XML

I need help with the transformation of my SOAP-request.

In XML my request looks like:

def response = soapClient.send(
"""<soapenv:Envelope xmlns:soapenv="http://ift.tt/sVJIaE"
    xmlns:ns="http://someLink/session/1.0"
    xmlns:bat="http://anotherLink/types/service"
    xmlns:com="http://anotherLink/types/common">
    <soapenv:Header>
        <ns:someValue>""" + this.someValue + """</ns:someValue>
    </soapenv:Header>
    <soapenv:Body>
        <bat:nameOfRequest>
            <com:info version="${this.version}"/>
            <bat:myId>${myId}</bat:myId>
        </bat:nameOfRequest>
    </soapenv:Body>
</soapenv:Envelope>""")

I want to get the Syntax similar to something like this:

def response = soapClient.send(SOAPAction: 'http://anotherLink/types/service/nameOfRequest'){
    header{
        SessionHeader('xmlns':'http://someLink/session/1.0'){
            someValue("${this.someValue}")
        }
    }
    body{
        nameOfRequest('xmlns':'http://anotherLink/types/service/'){
            info('xlmns':'http://anotherLink/types/common',version:'${this.version}')
            myId("${this.myId}")            
    }
}

I think I am doing something wrong with ne info attribute because I'm getting an Exception which says that there is no signature of method: java.lang.String.call() applicable for argument types (myClosure)