code: @Override
      public TrustGraphNodeId getNextHop(final TrustGraphAdvertisement message) {
          final TrustGraphNodeId prev = message.getSender();
          return getNextHop(prev);
      }
docs: Determine the next hop for a message.
  
  @param message the message to determine the next hop for
  @return the next TrustGraphNodeId to send the message to or null if
  the next hop cannot be determined.
  @see RandomRoutingTable.getNextHop(TrustGraphAdvertisement)