Microsoft.Windows.Controls.Ribbon.RibbonMenuButton.IsItemItsOwnContainerOverride C# (CSharp) Метод

        protected override bool IsItemItsOwnContainerOverride(object item)
        {
            bool ret = (item is RibbonMenuItem) || (item is RibbonSeparator) || (item is RibbonGallery);
            if (!ret)
            {
                _currentItem = item;
            }

            return ret;
        }