code: function site(bidderRequest) {
    const pubId = bidderRequest && bidderRequest.length > 0 ? bidderRequest[0].params.cp : '0';
    const appParams = bidderRequest[0].params.app;
    if (!appParams) {
      return {
        publisher: {
          id: pubId.toString(),
        },
        ref: referrer(),
        page: utils.getTopWindowLocation().href,
      }
    }
    return null;
  }
docs: Produces an OpenRTB site object.