add basic code

src/Shared/HandyControl_Shared/Controls/Ribbon/RibbonTabHeaderItemsControl.cs

@@ -0,0 +1,12 @@
+using System.Windows;
+using System.Windows.Controls;
+
+namespace HandyControl.Controls
+{
+    public class RibbonTabHeaderItemsControl : ItemsControl
+    {
+        protected override DependencyObject GetContainerForItemOverride() => new RibbonTabHeader();
+
+        protected override bool IsItemItsOwnContainerOverride(object item) => item is RibbonTabHeader;
+    }
+}