docs: protected void clientMessageHandler(DirectBuffer buffer, int offset, int length, Header header) {
          /**
           *  All incoming messages here are supposed to be "just messages", only unicast communication
           *  All of them should implement MeaningfulMessage interface
           */
          // TODO: to be implemented
          //  log.info("clientMessageHandler message request incoming");
  
          byte[] data = new byte[length];
          buffer.getBytes(offset, data);
  
          MeaningfulMessage message = (MeaningfulMessage) VoidMessage.fromBytes(data);
          completed.put(message.getTaskId(), message);
      }