code: private static String annotationToString(
        Class<? extends Annotation> type, Map<String, Object> members) throws Exception {
      StringBuilder sb = new StringBuilder().append("@").append(type.getName()).append("(");
      JOINER.appendTo(sb, Maps.transformValues(members, DEEP_TO_STRING_FN));
      return sb.append(")").toString();
    }
docs: Implements {@link Annotation#toString}.