This [IIFE](http://en.wikipedia.org/wiki/Immediately-invoked_function_expression) around `Aria.classDefinition` is harmless, but it's not needed here. It's only needed if you want to declare some local variables before the call  to `Aria.classDefinition` and you don't want them to leak to the outer scope. Hence you can remove this wrapping and reformat the file, hence saving one indentation level