code: func UpdateLabel(ctx context.Context, m *license.Manager, licenseKey string, key string, val string) error {
  	req := types.UpdateLicenseLabel{
  		This:       m.Reference(),
  		LicenseKey: licenseKey,
  		LabelKey:   key,
  		LabelValue: val,
  	}
  
  	_, err := methods.UpdateLicenseLabel(ctx, m.Client(), &req)
  	return err
  }
docs: // UpdateLabel provides a wrapper around the UpdateLabel data objects