docs: public void getData(final String path, Watcher watcher, DataCallback cb,
              Object ctx) {
          verbotenThreadCheck();
          final String clientPath = path;
          PathUtils.validatePath(clientPath);
  
          // the watch contains the un-chroot path
          WatchRegistration wcb = null;
          if (watcher != null) {
              wcb = new DataWatchRegistration(watcher, clientPath);
          }
  
          final String serverPath = prependChroot(clientPath);
  
          RequestHeader h = new RequestHeader();
          h.setType(ZooDefs.OpCode.getData);
          GetDataRequest request = new GetDataRequest();
          request.setPath(serverPath);
          request.setWatch(watcher != null);
          GetDataResponse response = new GetDataResponse();
          cnxn.queuePacket(h, new ReplyHeader(), request, response, cb,
                  clientPath, serverPath, ctx, wcb);
      }