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    Implement cross-cutting functionality with Angular Formly Extensions


    Assume we want to add a data-cy attribute to all of our form controls. We need this as a hook to later be able to easily grab our input fields from within our Cypress integration tests. Of course we could manually add these data- attributes to each of our formly field configuration. But there's a much more elegant approach: extensions. In this lesson we're going to see how they work.