1. DomName('SVGNumberList.replaceItem')
  2. DocsEditable()
Number replaceItem(Number item, int index)

Source 

@DomName('SVGNumberList.replaceItem')
@DocsEditable()
Number replaceItem(Number item, int index) => wrap_jso(_blink.BlinkSVGNumberList.instance.replaceItem_Callback_2_(unwrap_jso(this), unwrap_jso(item), index));