{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"desc"}]}
        desc { |tcx| "collecting upvars mentioned in `{}`", tcx.def_path_str(def_id) }
    query upvars_mentioned(def_id: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
    }