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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.
Unclear about what, return true or false depending on whether it's a valid hour
instruction very unclear.
it's cleaver but perhaps not the best pactice for beginners cause it's not that readable.