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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.
Depends on the langugae you're training on
This comment is hidden because it contains spoiler information about the solution
Did you post your comment on the wrong solution by accident? This solution is fine, one of the others has the problem you described.
Thank you for your comment. I think you're right, so i refactored my solution.