Usage of TermGroupFacetCollector and sorting by field [LUCENE-7675]

I'm using TermGroupFacetCollector

BooleanQuery.Builder b = new BooleanQuery.Builder();
for (Long id : keywordIds) {
b.add(new TermQuery(LuceneFieldFactory.createTerm(keywordField, id)), BooleanClause.Occur.SHOULD);
result.put(id, 0L);
}

TermGroupFacetCollector c = TermGroupFacetCollector.createTermGroupFacetCollector(sortedIdFieldName, sortedKeywordFieldName, true, null, keywordsSize);
s.search(b.build(), c);

I'm not able to make sort in method "search", because there is no necessary method's signature with Sort and Collector, how can it be solved?

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Migrated from [LUCENE-7675](https://issues.apache.org/jira/browse/LUCENE-7675) by Alexander Stepanov, updated Feb 10 2017

Start with TermGroupFacetCollector.createTermGroupFacetCollector and the IndexSearcher.search overloads shown in the issue. Check how collectors and Sort are currently combined, then determine the intended API change needed to support sorting with this collector. Done means the requested search can accept both sorting and the collector, with coverage for the relevant usage.

Written by the indexing model from the issue text.