Dealing with errors using async/await

When you use the async/await pattern, you can just handle errors with the try… catch syntax, exactly like you would when dealing with synchronous code. Refactor the handleError() method as shown here: 

Future handleError() async {
    try {
      await returnError();
    }
    catch (error) {
      setState(() {
        result = error;
      });
    }
    finally {
      print('Complete');
    }
  }

If you call handleError() in the onPressed method of the ElevatedButton, you should see that the catch was called, and the result is exactly the same as in the catchError callback.