Profile-level AllowNullCollections does not work for collections of mapped objects

[JustASquid]

Repro

        class TestProfile : Profile
        {
            public TestProfile()
            {
                AllowNullCollections = true;
                CreateMap<A, B>();
            }
        }

        class A
        {
            public string MyString { get; set; } = "";
        }

        class B
        {
            public string MyString { get; set; } = "";
        }
        
        static async Task Main(string[] args)
        {
            var mapper = new Mapper(new MapperConfiguration(cfg =>
            {
                cfg.AddProfile<TestProfile>();
            }));

            IList<A>? a = null;
            var b = mapper.Map<IList<B>>(a);
            
            // b is an empty list. I would expect b to be null.
            Console.WriteLine(b);
        }

Version: 10.1.1

Expected behavior

b is null

Actual behavior

b is an empty list

[lbargaoanu]

It's debatable. Mappings start in the global configuration and "move" into profiles. The profile settings certainly apply to members. You want to change that. I don't know :)