code: public void dhtNodes(List<Pair<String, Integer>> value) {
          string_int_pair_vector v = new string_int_pair_vector();
  
          for (Pair<String, Integer> p : value) {
              v.push_back(p.to_string_int_pair());
          }
  
          p.set_dht_nodes(v);
      }
docs: A list of hostname and port pairs, representing DHT nodes to be added
  to the session (if DHT is enabled). The hostname may be an IP address.
  
  @param value the list of DHT nodes