1. DomName('SVGPointList.insertItemBefore')
  2. DocsEditable()
Point insertItemBefore(Point newItem, int index)

Source 

@DomName('SVGPointList.insertItemBefore')
@DocsEditable()
Point insertItemBefore(Point newItem, int index) => _blink.BlinkSVGPointList.instance.insertItemBefore_Callback_2_(this, newItem, index);