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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.
Totally agree with your comment.
Const is better in current situation.
Please put a lot more details than this when raising issues. Language, error message, expectations, etc, etc. A full explanation helps us to solve the problem.
Problem(s) in your code.