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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 think the same, yellow is the nexus between red and green...
The sample test is not working and the example in the instructions has got a different name of function than in the code.