{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"Ok(sp)"}]}
        Ok(sp) => errors::ImplNotMarkedDefault::Ok { span, ident, ok_label: sp },
    let err = match tcx.span_of_impl(parent_impl) {
        Err(cname) => errors::ImplNotMarkedDefault::Err { span, ident, cname },