void stroke([Path2D path ])

Source 

void stroke([Path2D path]) {
  if (path == null) {
    _blink.BlinkCanvasRenderingContext2D.instance.stroke_Callback_0_(this);
    return;
  }
  if ((path is Path2D)) {
    _blink.BlinkCanvasRenderingContext2D.instance
        .stroke_Callback_1_(this, path);
    return;
  }
  throw new ArgumentError("Incorrect number or type of arguments");
}