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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.
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missing fixed test and explanation in the descripion: what to do when the
pref
isn't in thegroups
. That case does show up in the random tests and it has to be covered by the fixed tests because some implementations could struggle with that.