{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":")"}]}
) -> Result<(GenericArgsRef<'_>, GenericArgsRef<'_>), ErrorGuaranteed> {
    impl2_node: Node,
    let infcx = &tcx.infer_ctxt().build(TypingMode::non_body_analysis());