Method update

examples/example/mod.rs:118–118

(&mut self, _: &App)

    fn resize(&mut self, _: &App) {}
    fn event(&mut self, _: &App, _: winit::event::WindowEvent) {}
    fn update(&mut self, _: &App) {}
    fn render(&mut self, platform: &App, view: &wgpu::TextureView);
}