text: export function createAd(adAttributes = {}) {
    return {
      id: adAttributes.id || null,
      sequence: adAttributes.sequence || null,
      adType: adAttributes.adType || null,
      adServingId: null,
      categories: [],
      expires: null,
      viewableImpression: {},
      system: null,
      title: null,
      description: null,
      advertiser: null,
      pricing: null,
      survey: null, // @deprecated in VAST 4.1
      errorURLTemplates: [],
      impressionURLTemplates: [],
      creatives: [],
      extensions: [],
      adVerifications: [],
      blockedAdCategories: [],
      followAdditionalWrappers: true,
      allowMultipleAds: false,
      fallbackOnNoAd: null,
    };
  }
  