private static void addFixitySet(SolrInputDocument doc, Collection<DcsFixity> set) {
    if (set == null || set.size() == 0) {
      return;
    }

    for (DcsFixity fix : set) {
      setadd(doc, FixityField.ALGORITHM, fix.getAlgorithm());
      setadd(doc, FixityField.VALUE, fix.getValue());
    }
  }