code: func (s *SiteInfo) Ref(ref string, page page.Page, options ...string) (string, error) {
  	// Remove in Hugo 0.54
  	helpers.Deprecated("Site", ".Ref", "Use .Site.GetPage", true)
  	outputFormat := ""
  	if len(options) > 0 {
  		outputFormat = options[0]
  	}
  
  	return s.s.refLink(ref, page, false, outputFormat)
  }
docs: // Ref will give an absolute URL to ref in the given Page.