private StoredValues readValues(final ByteBuffer valueBuffer) {
        try (final DataReader reader =
                new KryoDataReader(new ByteBufferInput(valueBuffer))) {
            return valueReferenceIndex.read(reader);
        }
    }
Write data from the data store to an output removing them from the datastore as we go as they will be transferred
to another store.

@param output The output to write to.
stroom-query/stroom-query-common/src/main/java/stroom/query/common/v2/LmdbDataStore.java