@(classNames: List[String] = Nil) 
@svg("envelope", 44, 32, viewBox = true, classNames = classNames){
  <path d="M40 28H4V6l16 14h4L40 6v22zM36 4L22 16 8 4h28zm4-4H4L0 4v24l4 4h36l4-4V4l-4-4z"/>
}