code: func (api *API) UpdateZoneAccessRule(zoneID, accessRuleID string, accessRule AccessRule) (*AccessRuleResponse, error) {
  	return api.updateAccessRule("/zones/"+zoneID, accessRuleID, accessRule)
  }
docs: // UpdateZoneAccessRule updates a single access rule for the given zone &
  // access rule identifiers.
  //
  // API reference: https://api.cloudflare.com/#firewall-access-rule-for-a-zone-update-access-rule