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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.
I see, thank you.
If "System.Linq" counts as an external library then so does "System" or no?
I mean how does part of the Standard Library count as external? For me external represents Nuget packages.
a good next logical step, however originally the refactoring rules included
Do not use any external libraries