{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":")"}]}
    ) -> Result<(DefId, ty::GenericArgsRef<'tcx>), ErrorGuaranteed> {
        poly_trait_ref: ty::PolyTraitRef<'tcx>,
        if let Some(trait_ref) = poly_trait_ref.no_bound_vars() {