1. DomName('SVGPathSegList.appendItem')
  2. DocsEditable()
PathSeg appendItem(PathSeg newItem)

Source 

@DomName('SVGPathSegList.appendItem')
@DocsEditable()
PathSeg appendItem(PathSeg newItem) => wrap_jso(_blink.BlinkSVGPathSegList.instance.appendItem_Callback_1_(unwrap_jso(this), unwrap_jso(newItem)));