num rate

Source 

@DomName('SpeechSynthesisUtterance.rate')
@DocsEditable()
num get rate =>
    _blink.BlinkSpeechSynthesisUtterance.instance.rate_Getter_(this);
void rate=(num value)

Source 

@DomName('SpeechSynthesisUtterance.rate')
@DocsEditable()
set rate(num value) =>
    _blink.BlinkSpeechSynthesisUtterance.instance.rate_Setter_(this, value);