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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 can just use var keyword for java 11, without needing to import Annotation
I think it would be better if java.lang.annotation.Annotation would also be imported in the starting code.