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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.
I looked at the code and said "Why on Earth would anyone say this code doesn't work?"
Then I ran the test and after reading the compiler error I felt like I wanted to die.