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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.
just out of curiosity, could you mention how it is messy? the only error i understand is that the code doesn't check the each parameter fully. isn't that the only thing that needs to be corrected?