1. DomName('SVGSVGElement.getElementById')
  2. DocsEditable()
Element getElementById(String elementId)

Source 

@DomName('SVGSVGElement.getElementById')
@DocsEditable()
Element getElementById(String elementId) => wrap_jso(_blink.BlinkSVGSVGElement.instance.getElementById_Callback_1_(unwrap_jso(this), elementId));