code: func ValidateBootstrapGroupName(name string) error {
  	if BootstrapGroupRegexp.Match([]byte(name)) {
  		return nil
  	}
  	return fmt.Errorf("bootstrap group %q is invalid (must match %s)", name, api.BootstrapGroupPattern)
  }
docs: // ValidateBootstrapGroupName checks if the provided group name is a valid
  // bootstrap group name. Returns nil if valid or a validation error if invalid.