Method update

src/top_app_bar.rs:67–74

(&mut self, msg: Self::Message)

    }

    fn update(&mut self, msg: Self::Message) -> ShouldRender {
        match msg {
            Msg::Nav => {
                self.props.onnavigation.emit(());
            }
        }
        false
    }

    fn change(&mut self, props: Self::Properties) -> bool {
        if self.props != props {