{"ast_node_type":"other","tokens":[{"end":20,"kind":"keyword","start":0,"text":"desc"}]}
        desc { |tcx|
    query type_of_opaque_hir_typeck(key: LocalDefId) -> ty::EarlyBinder<'tcx, Ty<'tcx>> {
            "computing type of opaque `{path}` via HIR typeck",