GenTxid::emplace

template<
    class _Tp,
    class... _Args,
    size_t _Ip = __find_detail::__find_unambiguous_index_sfinae<_Tp, transaction_identifier<false>, transaction_identifier<true>>::value>
requires is_constructible_v<_Tp, _Args...>
[[__exclude_from_explicit_instantiation__, __abi_tag__]]
constexpr
_Tp&
emplace(_Args&&... __args);