code: func GetEnabledControllers() ([]string, error) {
  	controllersFile, err := os.Open("/sys/fs/cgroup/cgroup.controllers")
  	if err != nil {
  		return nil, err
  	}
  	defer controllersFile.Close()
  
  	sc := bufio.NewScanner(controllersFile)
  
  	sc.Scan()
  	if err := sc.Err(); err != nil {
  		return nil, err
  	}
  
  	return strings.Split(sc.Text(), " "), nil
  }
docs: // GetEnabledControllers returns a list of enabled cgroup controllers