/// <summary>
 /// Sets the movie as returned and clearing the appropriate values
 /// </summary>
 public void SetMovieAsReturned()
 {
     BarrowedByObjectIdentifier = null;
     SharedWithFirstName        = null;
     SharedWithLastName         = null;
     SharedWithEmailAddress     = null;
     Status = MovieStatuses.Available;
 }
 /// <summary>
 /// Set Request as completed
 /// </summary>
 public void SetAsCompleted()
 {
     Status = MovieStatuses.RequestCompleted;
 }