{"ast_node_type":"other","tokens":[{"end":101,"kind":"keyword","start":0,"text":"desc"}]}
        desc { |tcx| "looking up function parameter identifiers for `{}`", tcx.def_path_str(def_id) }
    query fn_arg_idents(def_id: DefId) -> &'tcx [Option<rustc_span::Ident>] {
        separate_provide_extern