docs: function Integration(options) {
      if (options && options.addIntegration) {
        // plugin
        return options.addIntegration(Integration);
      }
      this.debug = debug('analytics:integration:' + slug(name));
      var clonedOpts = {};
      extend(true, clonedOpts, options); // deep clone options
      this.options = defaults(clonedOpts || {}, this.defaults);
      this._queue = [];
      this.once('ready', bind(this, this.flush));
  
      Integration.emit('construct', this);
      this.ready = bind(this, this.ready);
      this._wrapInitialize();
      this._wrapPage();
      this._wrapTrack();
    }