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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.
Yes, it's a bit confusing since it says "inside a namespace MyNamespace", imo it should say "inside the namespace". Also the comment says "Define MyNamespace". Finally saying "class" and "namespace" could confuse people who comes from other OOP languages..