{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
        let assoc = cx.tcx.associated_item(impl_item.owner_id);
        let hir::ImplItemKind::Fn(_sig, body_id) = impl_item.kind else { return };
        let parent = assoc.container_id(cx.tcx);