//! Minimal stand-in for the real `gpui` crate. The lints key off the crate//! name and the type names, so we only need to reproduce the relevant API//! surface. use std::marker::PhantomData; // --- AppContext --- pub trait AppContext {    fn as_app_mut(&mut self) -> &mut App;} // --- App --- pub struct App; impl AppContext for App {    fn as_app_mut(&mut self) -> &mut App {        self    }} // --- Context --- pub struct Context<'a, T> {    _marker: PhantomData<&'a mut T>,} impl<T> AppContext for Context<'_, T> {    fn as_app_mut(&mut self) -> &mut App {        unimplemented!()    }} impl<T> Context<'_, T> {    pub fn notify(&mut self) {}} // --- Window --- pub struct Window; // --- Entity --- pub struct Entity<T> {    _marker: PhantomData<T>,} impl<T> Entity<T> {    pub fn update<R, C: AppContext>(        &self,        _cx: &mut C,        _f: impl FnOnce(&mut T, &mut Context<T>) -> R,    ) -> R {        unimplemented!()    }     pub fn read<'a>(&self, _cx: &'a App) -> &'a T {        unimplemented!()    }     pub fn read_with<R>(&self, _cx: &App, _f: impl FnOnce(&T, &App) -> R) -> R {        unimplemented!()    }     pub fn downgrade(&self) -> WeakEntity<T> {        unimplemented!()    }} // --- WeakEntity --- pub struct WeakEntity<T> {    _marker: PhantomData<T>,} impl<T> WeakEntity<T> {    pub fn update<R, C: AppContext>(        &self,        _cx: &mut C,        _f: impl FnOnce(&mut T, &mut Context<T>) -> R,    ) -> Result<R, ()> {        unimplemented!()    }} // --- Render traits --- pub trait IntoElement {} pub trait Render: 'static + Sized {    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement;} pub trait RenderOnce: 'static {    fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement;} impl IntoElement for () {}impl IntoElement for &str {}