java修改PMD出现的问题，大神们快来看看！！！！！！！

Question

代码如下：

public void contextDestroyed(final ServletContextEvent sce) {
        final ServletContext context=sce.getServletContext();
        context.removeAttribute("idlist");//这行提示“Potential violation of Law of Demeter (object not created locally)”请问各位如何修改？
}