When to use the GlobalKey in Flutter. With a GlobalKey a parent widget can access the state and methods of its child Stateful Widgets.
What is the JohannesMilke/global_key GitHub project? Description: "When to use the GlobalKey in Flutter. With a GlobalKey a parent widget can access the state and methods of its child Stateful Widgets.". Explain what it does, its main use cases, key features, and who would benefit from using it.
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