dispose method

@override void dispose()

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() {
  codeFilterController.dispose();
  titleFilterController.dispose();
  modelFilterController.dispose();
  codeController.dispose();
  titleController.dispose();
  modelController.dispose();
  super.dispose();
}