When setting up container/contained relationships, what is the proper approach? Is it the approach outlined in Stephan's book with IContainer, __setitem__, and preconditions? Or is it "contains" and "containers"?

I have been having some problems and would be curious the definitive approach. The former is more complicated and so I find make lots of coding errors. The latter is simple but I find it causes strange IInputWidget errors.


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David
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