1. DomName('Range.setStart')
  2. DocsEditable()
void setStart(Node refNode, int offset)

Source 

@DomName('Range.setStart')
@DocsEditable()
void setStart(Node refNode, int offset) => _blink.BlinkRange.instance.setStart_Callback_2_(unwrap_jso(this), unwrap_jso(refNode), offset);