code: func isValidServiceIdentityName(name string) bool {
  	if len(name) < 1 || len(name) > serviceIdentityNameMaxLength {
  		return false
  	}
  	return validServiceIdentityName.MatchString(name)
  }
docs: // isValidServiceIdentityName returns true if the provided name can be used as
  // an ACLServiceIdentity ServiceName. This is more restrictive than standard
  // catalog registration, which basically takes the view that "everything is
  // valid".