Type Alias LiveFn 

pub type LiveFn = Rc<dyn Fn(Rect, f64, &mut Scene)>;

Drawing that changes over time: receives the element’s frame and the clock in seconds. It runs on paint-only frames, at most 60 times a second, for as long as the view is built. With reduced motion it runs once, at time zero.

Aliased Type

pub struct LiveFn { /* private fields */ }