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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.
Thankfully the tests don't test for "sample", which is good because the behavior of the function when text is in the array isn't specified anyways, so assuming they are truthy is the only sane way to go.