{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
        // This is reachable (via `pretty_print_dyn_existential`) even though
    fn print_region(&mut self, _region: ty::Region<'_>) -> Result<(), PrintError> {
        // `<Self As PrettyPrinter>::should_print_region` returns false. See #144994.