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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.
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The test is broke. He made a comment last time saying he intentionally used the word 'swap' as it should 'imply' bi-directional movement but I guess somewhere along the lines he decided that bi-directional movement wasn't going to be supported.