{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"if"}]}
                        if !item.defaultness(tcx).has_value() {
                    Some(item) if matches!(item.kind, ty::AssocKind::Fn { .. }) => {
                            tcx.dcx().emit_err(errors::FunctionNotHaveDefaultImplementation {