public void setRetrieval(PrefetchRetrieval retrieval) {
        this.retrieval = retrieval;
    }
<p>
The configuration settings for retrieval of prefetched ads from the ad decision server. Only one set of
prefetched ads will be retrieved and subsequently consumed for each ad break.
</p>

@param retrieval
       The configuration settings for retrieval of prefetched ads from the ad decision server. Only one set of
       prefetched ads will be retrieved and subsequently consumed for each ad break.
aws-java-sdk-mediatailor/src/main/java/com/amazonaws/services/mediatailor/model/CreatePrefetchScheduleRequest.java