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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 missing the point. The idea is to support an arbitrary list of chainable methods. Your solution will fail if any methods other than those specifically coded are supplied to the chainer.