code: protected boolean shouldForward(TrustGraphAdvertisement message) {
          final int ttl = message.getInboundTTL();
  
          if (ttl <= 1 || ttl > getMaxRouteLength()) {
              return false;
          }
          return true;
      }
docs: Determines the policy for forwarding received messages.
  By default this policy drops messages with ttl higher than
  getMaxRouteLength() or there are no more hops (ttl <= 1)
  
  @return true if the message should be forwarded