code: public CookieConfigType<SessionConfigType<T>> getOrCreateCookieConfig()
     {
        Node node = childNode.getOrCreate("cookie-config");
        CookieConfigType<SessionConfigType<T>> cookieConfig = new CookieConfigTypeImpl<SessionConfigType<T>>(this, "cookie-config", childNode, node);
        return cookieConfig;
     }
docs: If not already created, a new <code>cookie-config</code> element with the given value will be created.
  Otherwise, the existing <code>cookie-config</code> element will be returned.
  @return  a new or existing instance of <code>CookieConfigType<SessionConfigType<T>></code>