{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"impl<T:"}]}
impl<T: PointeeSized + Unsize<U>, U: PointeeSized> DispatchFromDyn<*mut U> for *mut T {}
// *mut T -> *mut U
impl<T: MetaSized + Unsize<U>, U: MetaSized> DispatchFromDyn<Box<U>> for Box<T> {}