code: func (p *Plugin) getContainerList() ([]string, error) {
  	var ids []string
  
  	resp, err := p.Client.Get("http://localhost/v0/containers")
  	if err != nil {
  		return nil, err
  	}
  
  	defer resp.Body.Close()
  	err = json.NewDecoder(resp.Body).Decode(&ids)
  	return ids, errors.Wrap(err, "could not decode container list")
  }
docs: // getContainerList queries the /containers endpoint and returns a slice of
  // container IDs.