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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'd rather make the casting explicit, but I come from another programming world...
Tried this but dishes out compiler error. I don't know but it's best to convert size_t to int first.