code: function(options) {
    this.count = 0;
    this.jsZip = new JSZip();
    this.stream = new StreamBuf();
    this.stream.on('finish', () => {
      this._process();
    });
    this.getEntryType = options.getEntryType || (() => 'string');
  }
docs: ============================================================================= The ZipReader class Unpacks an incoming zip stream