return ("[" + (_prev == null ? "" : "<-") + getName() + "=" + _value + (_next == null ? "" : "->") + "]");
return ("[" + (_prev == null ? "" : "<-") + getName() + "="+_revision+"=" + _value + (_next == null ? "" : "->") + "]");
        public String toString()        {            return ("[" + (_prev == null ? "" : "<-") + getName() + "=" + _value + (_next == null ? "" : "->") + "]");        }