public SelectedState( State.IConstArg arg ) : base( arg ) { }
public UnselectableState( State.IConstArg arg ) : base( arg ) { }
public HidingState(State.IConstArg arg) : base(arg) { }
public ShowingState(State.IConstArg arg) : base(arg) { }
public HiddenState(State.IConstArg arg) : base(arg) { }