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It's often useful to load a view from a nib without needing or wanting an attached view controller. We could offer a category on NSView that makes this easy.
Note that it's not sufficient to use and discard an NSViewController, since that requires that the view outlet be hooked up in the nib, which may not necessarily be the case (or, at least, shouldn't be a requirement).
GHfM has some code to do this which could be genericized and cleaned up for Rebel.
And just for future selves, 10.8 has a method that makes this easier without the cray memory management semantics.
We're moving away from this in GHfM, partly because it's hard to get the semantics right, so I don't think we should do this after all.