{"ast_node_type":"other","tokens":[{"end":19,"kind":"keyword","start":0,"text":"//"}]}
// &mut T -> &mut U
impl<'a, T: PointeeSized + Unsize<U>, U: PointeeSized> DispatchFromDyn<&'a U> for &'a T {}
impl<'a, T: PointeeSized + Unsize<U>, U: PointeeSized> DispatchFromDyn<&'a mut U> for &'a mut T {}