Hmmm

DiagnosticsTemplateBinder.cs

public class DiagnosticsTemplateBinder : ITemplateBinder
{
    public bool CanBind(IBindRequest request)
    {
        var descriptor = request.Target.Descriptor as ViewDescriptor;
        if(descriptor == null || descriptor.ViewModel == null)
        {
            return false;
        }

        return descriptor.ViewModel.Assembly.Equals(GetType().Assembly);
    }

    public void Bind(IBindRequest request)
    {
        var master = request
            .TemplateRegistry
            .ByOrigin("FubuMVC.Diagnostics")
            .FirstOrDefault(t => t.Name().ToLower().Equals("application") && t.DirectoryPath().ToLower().Equals("shared"));
        if(master == null)
        {
            return;
        }

        request
            .Target
            .As<ViewDescriptor>()
            .Master = master;
    }
}