handleOnChanged method
Implementation
void handleOnChanged(BuildContext context, {required Object? value}) {
final knobsProvider = KnobsProvider.of(context);
final storyProvider = StoryProvider.of(context);
knobsProvider.knobStore.updateStoryKnobValue(
storyProvider.story.key,
knobKey: knobNode.key,
newValue: value,
);
}