Bindings should be extended or implemented.
When using GetMaterialApp, all GetPages and navigation
methods (like Get.to()) have a binding property that takes an
instance of Bindings to manage the
dependencies() (via Get.put()) for the Route you are opening.
Special callable class to keep the contract of a regular method, and avoid
overrides if you extend the class that uses it, as Dart has no final
Used in DisposableInterface to avoid the danger of overriding onStart.