docs: public void doDelete(@Param("dataMediaPairId") Long dataMediaPairId, @Param("pipelineId") Long pipelineId,
                           Navigator nav) throws WebxException {
          Channel channel = channelService.findByPipelineId(pipelineId);
          if (channel.getStatus().isStart()) {
              nav.redirectTo(WebConstant.ERROR_FORBIDDEN_Link);
              return;
          }
          dataMediaPairService.remove(dataMediaPairId);
          nav.redirectToLocation("dataMediaPairList.htm?pipelineId=" + pipelineId);
      }