class Element {
    String id;

    String getID() {
        return id;
    }

    public String method(Element element) {
        return getID() + element.getID();
    }

    public String staticMethod(Element element) {
        StringBuffer buffer = new StringBuffer();
        buffer.append(element.getID());
        return buffer.toString();
    }
    static Element toXML(Element element){
        X el= new X("El")
        el.setAttribute("attr", element.getID());
        return el;
    }
}

class Usage {
    public String staticMethod(Element element) {
        StringBuffer buffer = new StringBuffer();
        buffer.append(element.getID());
        return buffer.toString();
    }
}