/// <summary>Returns a new Ribbon Split(Press)Button view-model instance.</summary> internal SplitPressButtonVM NewSplitPressButton(string controlId, IMenuVM menu, IButtonVM button) => Add <SplitPressButtonVM, IButtonSource, ISplitPressButtonVM>(new SplitPressButtonVM(controlId, menu, button));
public SplitPressButtonVM(string itemId, IMenuVM menu, IButtonVM button) : base(itemId, menu) => ButtonVM = button;