public boolean partialMatch(FetchVector fetchVector) {
        return andConditions.stream()
                .allMatch(condition -> !fetchVector.hasDimension(condition.dimension()) || condition.test(fetchVector));
    }
Returns true if all the conditions on dimensions set in the fetch vector are satisfied.
Conditions on dimensions not specified in the given fetch vector are ignored.
flags/src/main/java/com/yahoo/vespa/flags/json/Rule.java