Name:Piotr K.
Clan:Unknown
Member Since:Sep 2017
Last Seen:Nov 2020
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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.
Only collection.size() is used, so why store the collection?
I think your solution will be better if you store only the size.