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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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Not efficient, but he use primitive types, not wrapper class. Is valid solution.
Well i try this form, but throws error whit some names, using methods from wrapper class is easy, but don't use is better