docs: public void initMultiCountMetrics(PhysicalPlanHelper helper) {
      // For spout, we would consider the output stream
      List<TopologyAPI.OutputStream> outputs = helper.getMySpout().getOutputsList();
      for (TopologyAPI.OutputStream outputStream : outputs) {
        String streamId = outputStream.getStream().getId();
        ackCount.scope(streamId);
        failCount.scope(streamId);
        timeoutCount.scope(streamId);
        emitCount.scope(streamId);
      }
    }