code: func (r HTML) Render(w http.ResponseWriter) error {
  	r.WriteContentType(w)
  
  	if r.Name == "" {
  		return r.Template.Execute(w, r.Data)
  	}
  	return r.Template.ExecuteTemplate(w, r.Name, r.Data)
  }
docs: // Render (HTML) executes template and writes its result with custom ContentType for response.