Source
TextTrack addTextTrack(String kind, [String label, String language]) { if (language != null) { return _blink.BlinkHTMLMediaElement.instance .addTextTrack_Callback_3_(this, kind, label, language); } if (label != null) { return _blink.BlinkHTMLMediaElement.instance .addTextTrack_Callback_2_(this, kind, label); } return _blink.BlinkHTMLMediaElement.instance .addTextTrack_Callback_1_(this, kind); }