So your understanding of the pattern #3 is that, null was being used instead of an empty list, and in this case it's better to use an empty container. In that c

So your understanding of the pattern #3 is that, null was being used instead of an empty list, and in this case it's better to use an empty container. In that case, it makes sense, that's not how I understood it at first. Oh and, I agree about the not using null thing at multiple levels.