Set State of parent Widget

Let's say, I have a custom button widget and I want to set the state of it's parent using setState. How exactly can I access the parent widget's state from my custom button? Is it even possibile?

You can use callbacks functions to achieve this. You can refer here.

In the link

• FeedPage is similar to CustomButton(ChildWiget)
• RootPage is similar to ParentWiget