public static void setText(Element element, String value) {
        while (element.hasChildNodes()) {
            element.removeChild(element.getFirstChild())
        }
        element.appendChild(element.ownerDocument.createTextNode(value))
    }

    public static void setChildren(Node element, Closure cl) {
        while (element.hasChildNodes()) {
            element.removeChild(element.getFirstChild())
        }

            fixProgramListings(doc)
        }
    }

    def addVersionInfo(Document doc) {
        Element releaseInfo = doc.createElement('releaseinfo')
        releaseInfo.appendChild(doc.createTextNode(version.get().toString()))
        doc.documentElement.bookinfo[0]?.appendChild(releaseInfo)
    }

    def fixProgramListings(Document doc) {

        Element element = createNode(name, attributes)
        if (value instanceof Node) {
            element.appendChild(document.importNode(value, true))
        } else {
            element.appendChild(document.createTextNode(value as String))
        }
        return element
    }

    protected Element createNode(Object name, Object value) {
        return createNode(name, [:], value)
    }