// Case: (b)
        if((container_.size() & 1) != 0)
            second_child--;
        else
            // Case: (c)
            if(second_child == container_.size() - 1)
                if(comparator_(*(container_.begin() + second_child), *(container_.begin() + second_child - 1)))
                    second_child--;
            // Case: (a)
            else
            {
                assert(second_child > container_.size() - 1);
                second_child--;
            }