code: public static SetMultimap<InetAddress, Token> loadTokens()
      {
          SetMultimap<InetAddress, Token> tokenMap = HashMultimap.create();
          for (UntypedResultSet.Row row : executeInternal("SELECT peer, tokens FROM system." + PEERS_CF))
          {
              InetAddress peer = row.getInetAddress("peer");
              if (row.has("tokens"))
                  tokenMap.putAll(peer, deserializeTokens(row.getSet("tokens", UTF8Type.instance)));
          }
  
          return tokenMap;
      }
docs: Return a map of stored tokens to IP addresses