{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
        let (_, generics, _) = ast.generics.split_for_impl();
        // Replace `'tcx` lifetime by the `'__lifted` lifetime
        let mut generics: syn::AngleBracketedGenericArguments = syn::parse_quote! { #generics };