code: func IsNotFound(err error) bool {
  	switch {
  	case err == nil:
  		return false
  	case strings.Contains(err.Error(), "does not exist"):
  		return true
  	case strings.Contains(err.Error(), "not found"):
  		return true
  	default:
  		return false
  	}
  }
docs: // IsNotFound returns true if err is not nil and represents a missing resource.