def injectSubjectKeys(def doc, def subjectKeys) {

        def subjectKeyGroup = doc.breadthFirst().group.find {it.@id.equals('1')}
        subjectKeyGroup.select1.each { subject ->
            subjectKeys.each{ key ->
                println("${subject - ${key}")
//              Node itemNode = new Node(it, "item", [id:it])
//              addItemElements(itemNode)
            }
        }
    }