{"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"poly_trait_ref:"}]}
        poly_trait_ref: ty::PolyTraitRef<'tcx>,
        item_segment: &rustc_hir::PathSegment<'tcx>,
    ) -> Result<(DefId, ty::GenericArgsRef<'tcx>), ErrorGuaranteed> {