public Shrink(JsString id_of_element, GrowOptions options)
     : base(id_of_element, options)
 {
 }
 public Shrink(HtmlElement el, GrowOptions options)
     : base(el, options)
 {
 }
 public Grow(HtmlElement el, GrowOptions options)
     : base(el, options)
 {
 }