class P {

        public static final String SERVER = Graph.Hidden.hide("server");

        public static final String ID = T.id.getAccessor();
        public static final String LABEL = T.label.getAccessor();

        public static final String NAME = "~server_name";
        public static final String ROLE = "~server_role";
        public static final String LOAD = "~server_load";
        public static final String MAX_LOAD = "~server_max_load";
        public static final String UPDATE_TIME = "~server_update_time";

        public static String unhide(String key) {<FILL_FUNCTION_BODY>}
    }

            final String prefix = Graph.Hidden.hide("server_");
            if (key.startsWith(prefix)) {
                return key.substring(prefix.length());
            }
            return key;
        
<no_super_class>