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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.
The first assertFalse of the class used for testing is wrong. After all the modifications done in the first and second child arrays, there is not any value equals zero, so..... the matrix should be considered as a valid board and by consequence, true.