code: public ParallelTaskBuilder prepareTcp(String command) {
          reinitIfClosed();
          ParallelTaskBuilder cb = new ParallelTaskBuilder();
          cb.setProtocol(RequestProtocol.TCP);
          cb.getTcpMeta().setCommand(command);
          return cb;
      }
docs: Prepare a parallel TCP Task.
  
  @param command
  the command
  @return the parallel task builder