I have some initial document setup that needs doing to a new
document... imagine starting a Pages document from a template, for
example. I don't want all the template instantiation to be undoable,
or to mark the document as needing saving.
How do I do this? This is a Core Data-based application. I've looked
for methods in NSManagedObjectContext and NSPersistentDocument.
NSDocument has updateChangeCount, but it reads like I should not call
it directly.
