code: function (validBidRequests, bidderRequest) {
      let requests = [];
  
      validBidRequests.forEach(bid => {
        let url = generateUrl(bid, bidderRequest);
        if (url) {
          requests.push({
            method: 'GET',
            url: generateUrl(bid, bidderRequest),
            bidId: bid.bidId,
            vastUrl: url.split('&fmt=json')[0]
          });
        }
      });
  
      return requests;
    }
docs: Make a server request from the list of BidRequests.
  @param validBidRequests list of valid bid requests that have passed isBidRequestValid check
  @param bidderRequest
  @returns {Array} of url objects