code: func setPrefix(slug string) (string, bool) {
  	if strings.HasPrefix(slug, "db") {
  		return slug, true
  	}
  	if strings.HasPrefix(slug, "file") {
  		return slug, false
  	}
  	return fmt.Sprintf("db/%s", slug), true
  }
docs: // implicitly use dashboards from Grafana DB not from a file system