public EndQuery orderByDesc(Annotation annotation, String fieldName) {
        order.add(new Object[]{annotation, fieldName, "desc"});
        return this;
    }
Order by desc.
https://docs.vespa.ai/en/reference/query-language-reference.html#order-by

@param annotation the annotation
@param fieldName the field name
@return the end query
client/src/main/java/ai/vespa/client/dsl/EndQuery.java