cache
Caches an ad. This method will first check if there is a cached ad and, if found, will do nothing. If no cached ad exists, the method will attempt to fetch it from the Chartboost server. Implement didCacheAd(event: CacheEvent, error: CacheError?)
to be notified of the cache request result.
Caches an ad with bid response. This method will parse the provided bid response and cache the ad accordingly.