final BytesRef bytes = values.get(docId);
in.reset(bytes.bytes, bytes.offset, bytes.length);
if (bytes.length == 0) {
count = 0;
} else {
count = in.readVInt();
if (count > refs.length) {
final int previousLength = refs.length;
refs = Arrays.copyOf(refs, ArrayUtil.oversize(count, RamUsageEstimator.NUM_BYTES_OBJECT_REF));
for (int i = previousLength; i < refs.length; ++i) {
refs[i] = new BytesRefBuilder();