private static void simplifyAndFillQueryValues(Map<Long, Set<Feature>> queryValues, Map<Feature, Long> subqueriesForValue) {
        for (Map.Entry<Feature, Long> entry : subqueriesForValue.entrySet()) {
            Feature feature = entry.getKey();
            Long subqueryBitmap = entry.getValue();
            Set<Feature> featureSet = queryValues.computeIfAbsent(subqueryBitmap, (k) -> new HashSet<>());
            featureSet.add(feature);
        }
    }
Converts a targeting query (the format provided by targeting team) into a file of Vespa queries formatted as URLs.

The format is the following:
- Each line represents one bulk query (upto 64 subqueries)
- Each bulk query has a set of subqueries separated by ";"
- Each subquery is of the format: attrName\tattrValue\tsubqueryIndex\tisRangeTerm;
- Some attributes have no value.
- Value may contain ";"

@author bjorncs
predicate-search/src/main/java/com/yahoo/search/predicate/utils/TargetingQueryFileConverter.java