code: func getCgroupParamUint(cgroupPath, cgroupFile string) (uint64, error) {
  	contents, err := ioutil.ReadFile(filepath.Join(cgroupPath, cgroupFile))
  	if err != nil {
  		return 0, err
  	}
  
  	return parseUint(strings.TrimSpace(string(contents)), 10, 64)
  }
docs: // Gets a single uint64 value from the specified cgroup file.