如何从Extended WPF Toolkit中禁用Avalon Dock中的选项卡？

I was going through an example a while back and set up properties to bind to visibility and other porperties on the LayoutItem. I am able to set them to visibile or not but now I want to disable the tabs. I had a binding to IsEnabled in my style, but now I don't see the property in the LayoutItem class. So I am thinking I may of added it during exploration of the ToolKit. But now I am using the Nuget package found online and I can not figure out a way to disable the tab of the panel. Any ideas, of a way to disable my tabs?I was going through an example a while back and