use iced_native::overlay; use iced_native::Element; use ouroboros::self_referencing; #[self_referencing(pub_extras)] pub struct Cache<'a, Message: 'a, Renderer: 'a> { pub element: Element<'a, Message, Renderer>, #[borrows(mut element)] #[covariant] pub overlay: Option<overlay::Element<'this, Message, Renderer>>, }