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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.
建议随机测试的例子能够给出，而不是只用来测试，随机测试的例子全部显示在显示Kata测试用例里面，不是一个公式
String[]::new能告诉我这个是什么意思吗