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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.
Small optimization: calling anyMatch with the inverse test for the last part will exit sooner.
It'll be better if you bring out the first two lines in the other static method
ingenious