docs: protected void shardMessageHandler(DirectBuffer buffer, int offset, int length, Header header) {
          /**
           * All incoming messages here are supposed to be unicast messages.
           */
          // TODO: implement fragmentation handler here PROBABLY. Or forbid messages > MTU?
          //log.info("shardMessageHandler message request incoming...");
          byte[] data = new byte[length];
          buffer.getBytes(offset, data);
  
          VoidMessage message = VoidMessage.fromBytes(data);
          if (message.getMessageType() == 7) {
              // if that's vector request message - it's special case, we don't send it to other shards yet
              //log.info("Shortcut for vector request");
              messages.add(message);
          } else {
              // and send it away to other Shards
              publicationForShards.offer(buffer, offset, length);
          }
      }