docs: public void sendAdvertisement(final BasicTrustGraphAdvertisement message,
                                    final TrustGraphNodeId sender,
                                    final TrustGraphNodeId toNeighbor,
                                    final int ttl) {
          final BasicTrustGraphAdvertisement outboundMessage = message.copyWith(sender, ttl);
          final TrustGraphNode toNode = nodes.get(toNeighbor);
          toNode.handleAdvertisement(outboundMessage);
      }