{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"attrs.by_key(sym::rustc_builtin_macro).tt_values().next().and_then(|tt|"}]}
                        attrs.by_key(sym::rustc_builtin_macro).tt_values().next().and_then(|tt| {
                    let explicit_name =
                            match tt.token_trees().flat_tokens().first() {