nl_tokens: Creates an instance of this class .
pl_tokens: function PlaybackRateMenuButton ( player , options ) { classCallCheck ( this , PlaybackRateMenuButton ) ; var _this = possibleConstructorReturn ( this , _MenuButton . call ( this , player , options ) ) ; _this . updateVisibility ( ) ; _this . updateLabel ( ) ; _this . on ( player , 'loadstart' , _this . updateVisibility ) ; _this . on ( <mask> , 'ratechange' , _this . updateLabel ) ; return _this ; }