67         using LG = std::scoped_lock<>;  in main()  typedef
68         LG lg;  in main()
71         using LG = std::scoped_lock<TestMutex>;  in main()  typedef
74             LG lg(m1);  in main()
80         using LG = std::scoped_lock<TestMutex, TestMutex>;  in main()  typedef
83             LG lg(m1, m2);  in main()
89         using LG = std::scoped_lock<TestMutex, TestMutex, TestMutex>;  in main()  typedef
92             LG lg(m1, m2, m3);  in main()
100         using LG = std::scoped_lock<MT>;  in main()  typedef
104             LG lg(m1);  in main()
111         using LG = std::scoped_lock<MT, MT>;  in main()  typedef
115             LG lg(m1, m2);  in main()
122         using LG = std::scoped_lock<MT, MT, MT>;  in main()  typedef
126             LG lg(m1, m2, m3);  in main()