text: var SpeechSynthesisUtterance = function(text) {
      this.text = text || '';
      this.lang;
      this.voiceURI;
      this.volume;
      this.rate;
      this.pitch;
  
      this.onstart = null;
      this.onend = null;
      this.onerror = null;
      this.onpause = null;
      this.onresume = null;
      this.onmark = null;
      this.onboundary = null;
  };
  
  module.exports = SpeechSynthesisUtterance;
  