Anonymous avatar Anonymous committed f78d362

expand a bit

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pyobjc/Doc/warts.txt

 
 - Some Cocoa classes store references to objects while not increasing the 
   reference count. One of those is NSOutlineView. A side-effect of this is that
-  you *must* use subclasses of NSObject in your NSOutlineView model.
+  you *must* use subclasses of NSObject in your NSOutlineView model, and you
+  *must* keep a reference to the objects you pass to NSOutlineView.
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