SpeechRecognitionEvent(String type, [Map initDict])

Source 

@DomName('SpeechRecognitionEvent.SpeechRecognitionEvent')
@DocsEditable()
factory SpeechRecognitionEvent(String type, [Map initDict]) {
  if (initDict != null) {
    var initDict_1 = convertDartToNative_Dictionary(initDict);
    return _blink.BlinkSpeechRecognitionEvent.instance.constructorCallback_2_(type, initDict_1);
  }
  return _blink.BlinkSpeechRecognitionEvent.instance.constructorCallback_1_(type);
}