MediaMetadata metadata

Source 

@DomName('MediaSession.metadata')
@DocsEditable()
@Experimental() // untriaged
MediaMetadata get metadata =>
    _blink.BlinkMediaSession.instance.metadata_Getter_(this);
void metadata=(MediaMetadata value)

Source 

@DomName('MediaSession.metadata')
@DocsEditable()
@Experimental() // untriaged
set metadata(MediaMetadata value) =>
    _blink.BlinkMediaSession.instance.metadata_Setter_(this, value);