Class FixedCheck

src/test/checkqueue_tests.cpp:60–65

};

struct FixedCheck
{
    std::optional<int> m_result;
    FixedCheck(std::optional<int> result) : m_result(result){};
    std::optional<int> operator()() const { return m_result; }
};

struct UniqueCheck {
    static Mutex m;