private static void registerSubqueryValues(int subquery, Set<Feature> values, Map<Feature, Long> subqueriesForValue) {
        if (values != null) {
            values.forEach(value -> subqueriesForValue.merge(value, 1L << subquery, (ids1, ids2) -> ids1 | ids2));
        }
    }
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