| 520 | |
| 521 | template <typename T, typename = int> |
| 522 | struct CheckKeyReturn : std::false_type {}; |
| 523 | |
| 524 | template <typename T> |
| 525 | struct CheckKeyReturn<T, decltype((void)T::check_key_return, 0)> |
nothing calls this directly
no outgoing calls
no test coverage detected