private void typeMismatch(final Method method, final Attribute attr) {
            value = new ExceptionProxy() {
                static final long serialVersionUID = 269;
                public String toString() {
                    return "<error>";   // eg:  @Anno(value=<error>)
                }
                protected RuntimeException generateException() {
                    return new AnnotationTypeMismatchException(method,
                                attr.type.toString());
                }
            };
        }