code: func (pe *providerEndpoint) Flash(args *FlashRequest, resp *FlashResponse) error {
  	defer metrics.IncrCounter([]string{"scada", "flash"}, 1)
  	if args.Severity != "" && args.Message != "" {
  		pe.p.logger.Printf("[%s] scada-client: %s", args.Severity, args.Message)
  	}
  	return nil
  }
docs: // Flash is invoked by the broker log a message