code: public long getTotal(final int id) {
          BaseDownloadTask.IRunningTask task = FileDownloadList.getImpl().get(id);
          if (task == null) {
              return FileDownloadServiceProxy.getImpl().getTotal(id);
          }
  
          return task.getOrigin().getLargeFileTotalBytes();
      }
docs: Get the total bytes of the target file for the task with the {code id}.