onRefreshed() requires a Future<void> object to be returned

However if you are using any state management system, you do not need this and it would not refresh at all. A solution that I found that might interest some would be by following links

https://github.com/dart-lang/sdk/issues/32443#issuecomment-697310800

The issue references a Dart SDK issue about Future and state management. Examine the onRefreshed() method in the Liquid-Pull-To-Refresh codebase to understand its current implementation and how it interacts with state management. Check the linked comment for context on the workaround. Determine what changes are needed to make the refresh work correctly with state management systems.

Written by the indexing model from the issue text.