struct A
    {
        A(int a, int b)
        {
            a_ = a;
            b_ = b;
        }
        int a_ = -1;
        int b_ = -2;
    };
    std::list<A> testContainer{{1, 2}, {3, 4}, {5, 6}, {7, 8}};

    auto ptr = testContainer.begin();
    A* ptr2{};
    for (auto iter = testContainer.begin(); iter != testContainer.end(); iter++) {
        if (iter->a_ == 7) {
            ptr2 = &*iter;

            break;
        }
    }

    testContainer.erase(std::remove_if(testContainer.begin(), testContainer.end(), [&] (auto& element) {return element.a_ == 5;}), testContainer.end());

    /*for (auto iter = testContainer.begin(); iter != testContainer.end(); iter++) {
        if (iter->a_ == 5) {
            testContainer.erase(iter);

            break;
        }
    }*/

    testContainer.emplace_back(9, 10);
    testContainer.emplace_back(11, 12);

    auto value = *ptr;
    auto value2 = *ptr2;