The generics (values inside <> brackets) tell Flutter what type of provider to look for. Then Flutter goes up through the widget tree until it finds the provided value. If the value isn’t provided anywhere then an exception is thrown. Finally, once you’ve got the provider, you can call any method on it.12 Haz 2020
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You have to pass the thing being provided directly to the dialog constructor to access it in the dialog’s new context . You can also give it to a new Provider widget at the top of your dialog tree if you have a very deep widget tree in the dialog and you want to access it from somewhere deeper.
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