{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"ty::Ref(_region,"}]}
        ty::Ref(_region, ty, mutbl) => Ty::new_ptr(tcx, ty, mutbl),
        // `Option<T>` of these types are their raw pointer counterparts.
        // There is no nullable equivalent for Rust's function pointers,