{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"get_transmute_from_to(cx,"}]}
            get_transmute_from_to(cx, expr).map(|(ty1, ty2)| (ty1.kind(), ty2.kind()))
        if let Some((&ty::Ref(_, _, from_mutbl), &ty::Ref(_, _, to_mutbl))) =
        {