{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"src.clone().next().map_or(delim_span.close,"}]}
                        src.clone().next().map_or(delim_span.close, |it| it.first_span()),
                    res.add_err(ExpandError::binding_error(
                        format!("expected ident: `{lhs}`"),