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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
the test expected a Maybe Int type.
You may have misunderstood the point of this kata.
BTW, it's actually possible to check for specific functions being hidden from imports. There is a very obvious one that should then also be hidden, but there are more.
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isn't an instance of umpteen well-known classes for nothing. But I don't think forbidding everything was the intention of this kata.