code: public void dhtGetItem(byte[] key, byte[] salt) {
          s.dht_get_item(Vectors.bytes2byte_vector(key), Vectors.bytes2byte_vector(salt));
      }
docs: Query the DHT for a mutable item under the public key {@code key}.
  this is an ed25519 key. The {@code salt} argument is optional and may be left
  as an empty string if no salt is to be used.
  <p>
  if the item is found in the DHT, a {@link DhtMutableItemAlert} is
  posted.
  
  @param key
  @param salt