num defaultPlaybackRate

Source 

@DomName('HTMLMediaElement.defaultPlaybackRate')
@DocsEditable()
num get defaultPlaybackRate =>
    _blink.BlinkHTMLMediaElement.instance.defaultPlaybackRate_Getter_(this);
void defaultPlaybackRate=(num value)

Source 

@DomName('HTMLMediaElement.defaultPlaybackRate')
@DocsEditable()
set defaultPlaybackRate(num value) => _blink.BlinkHTMLMediaElement.instance
    .defaultPlaybackRate_Setter_(this, value);