code: func (api *API) enableRailgun(railgunID string, enable bool) (Railgun, error) {
  	uri := api.userBaseURL("") + "/railguns/" + railgunID
  	params := struct {
  		Enabled bool `json:"enabled"`
  	}{
  		Enabled: enable,
  	}
  	res, err := api.makeRequest("PATCH", uri, params)
  	if err != nil {
  		return Railgun{}, errors.Wrap(err, errMakeRequestError)
  	}
  	var r railgunResponse
  	if err := json.Unmarshal(res, &r); err != nil {
  		return Railgun{}, errors.Wrap(err, errUnmarshalError)
  	}
  	return r.Result, nil
  }
docs: // enableRailgun enables (true) or disables (false) a Railgun for all zones connected to it.
  //
  // API reference: https://api.cloudflare.com/#railgun-enable-or-disable-a-railgun