On 01/12/2012, at 9:01 AM, Sean McBride <s...@rogue-research.com> wrote:

> Could be.  But Apple could have provided a NSPersistentDocument2 class that 
> people could opt into.  But they haven't.


Have you noticed that they never do this though? It must be some sort of policy 
because there are numerous examples where a fork would seem to make more sense 
than adding more and more features to a class. NSTableView comes to mind among 
others.

--Graham
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