public void SetIsStopped(LearningStoppedStatus stoppedStatus)
 {
     StoppedStatus = LearningFound ? stoppedStatus : null;
 }
 public LearningData(bool isFound, string notFoundReason = "")
 {
     LearningFound  = isFound;
     NotFoundReason = notFoundReason;
     StoppedStatus  = new LearningStoppedStatus(false);
 }