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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.
You're running into difficulty here because the result of each call to the function must itself be callable (so you can chain another function call), while at the same time also being a legitimate string (in case you don't chain another function call and just use the return value as-is).
You're running into difficulty here because the result of each call to the function must itself be callable (so you can chain another function call), while at the same time also being a legitimate string (in case you don't chain another function call and just use the return value as-is).