public Element getChild(String cname, Namespace namespace) {
    for (Content child : content) {
      if (child instanceof Element) {
        Element element = (Element)child;
        if (element.name.equals(cname) && (namespace == null || namespace.equals(element.namespace))) {
          return element;
        }
      }
    }
    return null;
  }
public Element getChild(String cname, Namespace namespace)