Flutter alertdialog relleno
titlePadding: const EdgeInsets.only(top: 24.0, left: 24.0, right: 24.0),
contentPadding: const EdgeInsets.fromLTRB(24.0, 20.0, 24.0, 24.0),
actionsPadding: const EdgeInsets.all(0.0), // Padding around the set of actions at the bottom of the dialog.
buttonPadding: const EdgeInsets.all(8.0), // The padding that surrounds each button in actions.
insetPadding: const EdgeInsets.symmetric(horizontal: 40.0, vertical: 24.0),
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