code: private static CpuAcctMetric parse(final List<String> lines)
    {
      // File has a header. We skip it
      // See src/test/resources/cpuacct.usage_all for an example
      final int ncpus = lines.size() - 1;
      final long[] usrTime = new long[ncpus];
      final long[] sysTime = new long[ncpus];
      for (int i = 1; i < lines.size(); i++) {
        final String[] splits = lines.get(i).split(CgroupUtil.SPACE_MATCH, 3);
        if (splits.length != 3) {
          throw new RE("Error parsing [%s]", lines.get(i));
        }
        final int cpuNum = Integer.parseInt(splits[0]);
        usrTime[cpuNum] = Long.parseLong(splits[1]);
        sysTime[cpuNum] = Long.parseLong(splits[2]);
      }
      return new CpuAcctMetric(usrTime, sysTime);
    }
docs: Private because it requires a specific format and cant' take a generic list of strings