I forgot to mention, the typical situation for these things for added elements is to add `_ex` or the like, which is not a great solution. You can see this in v

I forgot to mention, the typical situation for these things for added elements is to add `_ex` or the like, which is not a great solution. You can see this in various places in Erlang, especially around erl_interface and related aspects. On the flip side, what if you realize a data structure needs to remove elements? Say revision 2 adds a field, but revision 3 removes it?