public PreviouslyWatchedVideosResponse(RecommendationJob job, int[] previouslyWatchedVideoIds)
 {
    Job = job;
    PreviouslyWatchedVideoIds = previouslyWatchedVideoIds;
 }
 public UnseenVideosResponse(RecommendationJob job, Video[] unseenVideos)
 {
     Job = job;
      UnseenVideos = unseenVideos;
 }
 public PreviouslyWatchedVideosRequest(RecommendationJob job)
 {
    Job = job;
 }
 public UnseenVideosRequest(RecommendationJob job, int[] previouslySeenVideoIds)
 {
     Job = job;
      PreviouslySeenVideoIds = previouslySeenVideoIds;
 }