code: function(serverResponse) {
      let responseBody = serverResponse.body;
      const bids = [];
      if (responseBody && responseBody.no_bid !== 1) {
        let size = parseSize(responseBody.size);
        let bid = {
          requestId: responseBody.bid_id,
          ttl: BID_RESPONSE_TTL_SEC,
          netRevenue: IS_NET_REVENUE,
          currency: responseBody.currency,
          creativeId: responseBody.creative_id,
          cpm: responseBody.cpm,
          width: size[0],
          height: size[1]
        };
        if (responseBody.vast_url) {
          bid.mediaType = 'video';
          bid.vastUrl = responseBody.vast_url;
        } else {
          bid.mediaType = 'banner';
          bid.ad = responseBody.ad;
        }
        bids.push(bid);
      }
      return bids;
    }
docs: Callback for bids, after the call to DSP completes.
  Parse the response from the server into a list of bids.
  
  @param {object} serverResponse A response from the GetIntent's server.
  @return {Bid[]} An array of bids which were nested inside the server.