public SimpleRemoveDelayedOperation(PersistentGenericSet <T> enclosingInstance, T value)
 {
     this.enclosingInstance = enclosingInstance;
     this.value             = value;
 }
 public ClearDelayedOperation(PersistentGenericSet <T> enclosingInstance)
 {
     this.enclosingInstance = enclosingInstance;
 }