1. DomName('HTMLVideoElement.getVideoPlaybackQuality')
  2. DocsEditable()
  3. Experimental()
VideoPlaybackQuality getVideoPlaybackQuality()

Source 

@DomName('HTMLVideoElement.getVideoPlaybackQuality')
@DocsEditable()
@Experimental() // untriaged
VideoPlaybackQuality getVideoPlaybackQuality() => _blink.BlinkHTMLVideoElement.instance.getVideoPlaybackQuality_Callback_0_(this);