we love post fix

src/layout/widget.rs

@@ -33,6 +33,12 @@ pub trait WidgetLike<Ctx, Tag> {
     {
         self.add(ui).into_static()
     }
+    fn set_root(self, ui: &mut Ui<Ctx>)
+    where
+        Self: Sized,
+    {
+        ui.set_root(self);
+    }
 }
 
 /// A function that returns a widget given a UI.