        ui.collapsing("Test box rendering", |ui| self.box_painting.ui(ui));

        CollapsingHeader::new("Scroll area")
            .default_open(false)
            .show(ui, |ui| {
                ScrollArea::from_max_height(200.0).show(ui, |ui| {
                    ui.label(LOREM_IPSUM_LONG);
                });
            });

        CollapsingHeader::new("Painting")