code: function nativeResponse(imp, bid) {
    if (imp['native']) {
      const nativeAd = parse(bid.adm);
      const keys = {};
      if (nativeAd && nativeAd['native'] && nativeAd['native'].assets) {
        nativeAd['native'].assets.forEach(asset => {
          keys.title = asset.title ? asset.title.text : keys.title;
          keys.body = asset.data && asset.data.type === 2 ? asset.data.value : keys.body;
          keys.sponsoredBy = asset.data && asset.data.type === 1 ? asset.data.value : keys.sponsoredBy;
          keys.image = asset.img && asset.img.type === 3 ? asset.img.url : keys.image;
          keys.icon = asset.img && asset.img.type === 1 ? asset.img.url : keys.icon;
        });
        if (nativeAd['native'].link) {
          keys.clickUrl = encodeURIComponent(nativeAd['native'].link.url);
        }
        keys.impressionTrackers = nativeAd['native'].imptrackers;
        return keys;
      }
    }
    return null;
  }
docs: Parses the native response from the Bid given.