Class TKey

util/generic/set_ut.cpp:266–278

    }

    struct TKey {
        TKey()
            : m_data(0)
        {
        }

        explicit TKey(int data)
            : m_data(data)
        {
        }

        int m_data;
    };

    struct TKeyCmp {
        bool operator()(TKey lhs, TKey rhs) const {