Closing Dart

I want closure everywhere. The more places you can use closure the better, as far as I'm concerned. We've been through waves of things like originally, well, throughout really people coming from Java. So that's always been a strong or probably the strongest inflow component. Generally the next biggest one is people coming from other dynamic languages like JavaScript, Python and Ruby. But I do feel like it's been changing a bit but I'm not sure that I understand how exactly.