{"ast_node_type":"variable","tokens":[{"end":47,"kind":"keyword","start":0,"text":"let"}]}
        let span = self.mk_sp(start, self.pos);
    fn maybe_report_guarded_str(&mut self, start: BytePos, str_before: &'src str) -> TokenKind {
        let edition2024 = span.edition().at_least_rust_2024();