{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"//"}]}
                    // "doesn't make sense in practice" (see rust-lang/rust#87027).
                    // in which case rustc ignores the helper attributes from the latter, but it
                    if let Some((name, helpers)) = parse_macro_name_and_helper_attrs(attr) {