code: function(validBidRequests) {
      var bidRequests = [];
      for (var i = 0, len = validBidRequests.length; i < len; i++) {
        var bid = validBidRequests[i];
        var accountID = utils.getBidIdParameter('accountID', bid.params);
        var slotID = utils.getBidIdParameter('slotID', bid.params);
        var url = utils.getTopWindowUrl();
        var flash = _getFlash();
        var nocache = new Date().getTime() + Math.floor(Math.random() * 100000000);
        var requestURL;
  
        requestURL = '_aid=' + accountID + '&';
        requestURL += '_slot=' + slotID + '&';
        requestURL += '_url=' + url + '&';
        requestURL += '_flash=' + flash + '&';
        requestURL += '_nocache=' + nocache;
  
        bidRequests.push({
          method: 'GET',
          url: BASE_URL,
          data: requestURL,
          bidRequest: bid
        })
      }
      return bidRequests;
    }
docs: Format the bid request object for our endpoint
  @param  {BidRequest[]} bidRequests Array of brainy bidders
  @return object of parameters for Prebid AJAX request
   
  入札リクエストをbrainyに対応するように整形する
  @param  {BidRequest[]} bidRequests 入札のための配列
  @return Prebid AJAX用に整形したオブジェクト