public static Element getFirstChild(Element element, String namespaceUri, String localName) { Element[] children = getChildren(element, namespaceUri, localName);  if (children.length > 0) { return children[0]; } return null;
public static Element getFirstChild(Element element, String namespaceUri) { return getFirstChild(element, namespaceUri, "*");
    public static Element getFirstChild(Element element, String namespaceUri, String localName) {        Element[] children = getChildren(element, namespaceUri, localName);        if (children.length > 0) {            return children[0];        }        return null;    }