nl_tokens: Creates an instance of this class .
pl_tokens: function TextTrackButton ( player ) { var options = arguments . <mask> > 1 && arguments [ 1 ] !== undefined ? arguments [ 1 ] : { } ; classCallCheck ( this , TextTrackButton ) ; options . tracks = player . textTracks ( ) ; return possibleConstructorReturn ( this , _TrackButton . call ( this , player , options ) ) ; }