public void addRangeFeature(String key, long value, long subqueryBitMap) {
        rangeFeatures.add(new RangeFeature(key, value, subqueryBitMap));
    }
Adds a range feature to the query, e.g. age = 25.

@param key a feature key
@param value a feature value
@param subqueryBitMap the subquery bitmap for which this term is true
predicate-search/src/main/java/com/yahoo/search/predicate/PredicateQuery.java