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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.
jane.has(2).hands.each(hand => having(5).fingers);
This part in the JS test makes no sense. Why have a function that receives hand if it won't be used? And why use having from outer scope?
It makes more sense if the inner function is (hand => hand.having(5).fingers).