String vertical

Source 

@DomName('VTTCue.vertical')
@DocsEditable()
@Experimental() // untriaged
String get vertical => _blink.BlinkVTTCue.instance.vertical_Getter_(this);
void vertical=(String value)

Source 

@DomName('VTTCue.vertical')
@DocsEditable()
@Experimental() // untriaged
set vertical(String value) =>
    _blink.BlinkVTTCue.instance.vertical_Setter_(this, value);