Let’s say I have ResponseModels<T> and ResponseDTOs<T> both with properties IEnumerable<T> and int TotalCount

I know I can create generic mapping using

CreateMap(typeof(ResponseModels<>), typeof(ResponseDTOs<>));

My goal is to take only MaxOutListLength of items during mapping. I know I can create complex mapping for member using the following (but only if generic type is defined).

CreateMap<ResponseModels<Order>, ResponseDTOs<OrderDTO>>()
    .ForMember(
        dst => dst.Items,
        opt => opt.MapFrom(
            src =>
            src.Items!.Take(MaxOutListLength))
        )
    .ForMember(
        dst => dst.Count,
        opt => opt.MapFrom(
            src =>
            src.Items.Count() > MaxOutListLength ? MaxOutListLength : src.Items.Count())
        );

How can I combine these two approaches?

I tried the following code, but object does not contain a definition for 'Items'

CreateMap(typeof(ResponseModels<>), typeof(ResponseDTOs<>))
    .ForMember(
        dst => dst.Items,
        opt => opt.MapFrom(
            src =>
            src.Items!.Take(MaxOutListLength))
        )
    .ForMember(
        dst => dst.Count,
        opt => opt.MapFrom(
            src =>
            src.Items.Count() > MaxOutListLength ? MaxOutListLength : src.Items.Count())
        );