code: func NewPullImageError(name string, err error) error {
  	return Error{
  		Message:    fmt.Sprintf("unable to get %s", name),
  		Details:    err,
  		ErrorCode:  PullImageError,
  		Suggestion: fmt.Sprintf("check image name, or if using a local image set the builder image pull policy to %q", "never"),
  	}
  }
docs: // NewPullImageError returns a new error which indicates there was a problem
  // pulling the image