public ConjunctionIndex build() {
        int[] zList = Ints.toArray(zListBuilder);
        IntObjectMap<ConjunctionIndex.FeatureIndex> kIndex = buildKIndex(kIndexBuilder);
        long[] idMapping = Longs.toArray(seenIds);
        return new ConjunctionIndex(kIndex, zList, idMapping);
    }
A builder for {@link ConjunctionIndex}.

@author bjorncs
predicate-search/src/main/java/com/yahoo/search/predicate/index/conjunction/ConjunctionIndexBuilder.java