https://docs.ros.org/en/humble/p/tl_expected/generated/structtl_1_1detail_1_1invoke__result__impl_3_01F_00_01decltype_07detail_1_1invoke_07std_1_1declvcbceb13962854eff875073298b31c9c4.html
Template Struct invoke_result_impl F, decltype(detail::invoke(std::declval F , (), std::declval...
templatestructinvokeresultimpl