dispose method
Releases everything this controller owns. The page that created the controller calls this from its own
State.dispose(); a subclass that adds its own notifiers overrides this and ends with super.dispose().
Implementation
@override
void dispose() {
titleController.dispose();
subTitleController.dispose();
descriptionController.dispose();
detail1Controller.dispose();
detail2Controller.dispose();
buttonTextController.dispose();
buttonLinkController.dispose();
linkController.dispose();
orderController.dispose();
instagramController.dispose();
telegramController.dispose();
whatsappController.dispose();
phoneController.dispose();
_disposeRows();
super.dispose();
}