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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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What happens when i send in 2147483647 or -1
What about nulls? this will throw a NPE if null is passed in for the string.