num weight

Source 

@DomName('SpeechGrammar.weight')
@DocsEditable()
num get weight => _blink.BlinkSpeechGrammar.instance.weight_Getter_(this);
void weight=(num value)

Source 

@DomName('SpeechGrammar.weight')
@DocsEditable()
set weight(num value) =>
    _blink.BlinkSpeechGrammar.instance.weight_Setter_(this, value);