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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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There's no really such a thing as just
(?i)in Java. It could be (a part of) some other construct, like a part of ternary operator expression, or (a part of) a regex pattern, but without any further context it's difficult to tell.