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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.
That's against the rules.
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A naked return doesn't require the variable to be explicitly called in the return line if it is already defined to be returned in the signature.