int[] contents = {0};
long unknown = index.getUnknownTermId();
// --- Get the query terms
if (1 == 1) throw new NotImplementedException("topic parts below");
final Query query = topic.getTopicPart(null);
Set<String> queryTermStrings = new HashSet<>();
LongArraySet queryTermSet = new LongArraySet();
query.addTerms(queryTermStrings);
for (String term : queryTermStrings) {
final long termId = index.getTermId(term);
if (termId != unknown) {
queryTermSet.add(termId);
}