{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
                        let span_map = db.expansion_span_map(macro_file);
                    if let Some(macro_file) = source.file_id.macro_file() {
                        body = prettify_macro_expansion(db, body, &span_map, it.krate(db).into());