_findChains(s, listKey)
_findChains(s, mv.listKey())
  protected static String findKey(                            GrouperSession s, String listKey, List chain                          )   {    String key = _compare(  // Compare             chain,         // this chain             _filterByLength(                chain.size(), // with other chains of the appropriate length              _findChains(s, listKey) // that start with this listKey             )           );    return key;  }