code: func GetEnabledCgroups() (map[int][]string, error) {
  	cgroupsFile, err := os.Open("/proc/cgroups")
  	if err != nil {
  		return nil, err
  	}
  	defer cgroupsFile.Close()
  
  	cgroups, err := parseCgroups(cgroupsFile)
  	if err != nil {
  		return nil, errwrap.Wrap(errors.New("error parsing /proc/cgroups"), err)
  	}
  
  	return cgroups, nil
  }
docs: // GetEnabledCgroups returns a map with the enabled cgroup controllers grouped by
  // hierarchy